The Strike
Find an accomplice
SEEDANCE 2.5 · VIDEO PROMPT
Continuous single-take handheld vertical smartphone video, 12 seconds, no cuts. Scene lock from the start frame: dim humid reptile enclosure under a corrugated shade roof, algae-streaked concrete wall above a shallow murky green pool, a keeper in a dark green polo kneeling on the wet ledge leaning down with his bare forearm holding a dead rat over the water, a very large green anaconda coiled half-submerged below with one coil tensed, railing bars and a child's hand at the bottom of the frame, visitors' sneakers at the top edge. Keep the start frame's lighting, colors, framing and the keeper's face unchanged. 0-3s: The keeper dangles the rat, tapping it on the surface, the anaconda's head drifts closer, tongue flicking, coils shifting slowly under the water. The keeper glances up and says something to the visitors, then looks back down. 3-5s: The snake strikes upward in a blur, bites the keeper's forearm, and in the same motion a thick coil whips up over the wall edge and wraps his arm, yanking him forward so his chest slams onto the concrete lip, head and shoulders hanging over the pool. The rat drops into the water. 5-9s: The keeper braces his free hand against the wall and shouts, his legs kicking on the ledge. A second keeper in the same green polo sprints into frame from the right, grabs him by the belt and waist, and both pull backwards while the snake's body tightens and drags the trapped arm toward the water, the wet coil sliding on the concrete. A third pair of hands grabs the first keeper's shoulder. 9-12s: With a sudden lurch they all fall backwards onto the ledge in a pile, the anaconda releases and drops back into the pool with a heavy splash, its body sliding away under the green water. The camera stumbles back as the visitor retreats, framing tilting to the railing and back, finding the first keeper sitting up clutching his forearm, the second keeper on his knees, a child crying somewhere behind the phone. Camera shakes hard at the strike, framing slips and recovers, autofocus hunting between the railing bars and the keepers, rolling shutter wobble, slight exposure flicker under the shade roof. Ambient audio: echoing enclosure acoustics, a splash, men shouting "pull, pull", the metal railing rattling, a child screaming, a woman saying "oh my god" repeatedly. No music. No text, no overlay, no logo, no slow motion, no cinematic camera moves, no cuts.
Other prompts in this tutorial
NANO BANANA PRO · IMAGE PROMPT
Vertical amateur smartphone video frame, shot by a visitor standing behind a waist-high metal railing at a reptile park, overcast daylight under a corrugated shade roof, dim humid enclosure with a shallow murky green pool below a low concrete viewing wall. A keeper in a dark green polo shirt kneels on the wet concrete edge, leaning far down over the wall, one bare forearm extended toward the water to hold a dead rat by the tail just above the surface. Beneath the rat, a very large green anaconda's head rests half-submerged, thick coils of its body looping through the shallow water and over a mossy rock, the coil nearest the keeper visibly tensed. Algae streaks and water stains run down the concrete wall, a coiled hose and a plastic bucket sit on the ledge. The railing bars and a child's hand gripping them intrude at the bottom of the frame, other visitors' sneakers visible at the top edge. The keeper's face is turned down toward the snake, concentrating, damp hair, natural skin texture. Composed like an iPhone 15 Pro 26mm f/1.8 shot, slightly tilted, keeper off-center, crisp sharp focus across the frame, clean HDR look, realistic muted greens and greys, slightly underexposed in the shaded pool, no filters. Clear separation between keeper's arm, wall and water. The tensed coil and the dangling rat are ready to move. No text, no watermark, no logo, no on-screen overlay, no extra arms, no deformed hands, no studio polish.
Tutorial
DENIZ AKKABAK · SEEDANCE 2.5 TUTORIAL · @DENIZ.AKKABAK
MADE IN INVIDEO · invideo.io/i/DENIZ-ig
The Strike
How a boring zoo feeding photo becomes a twelve-second anaconda attack that looks like it was filmed on a visitor's phone.
A TUTORIAL BY DENIZ AKKABAK · @DENIZ.AKKABAK
PIPELINE NANO BANANA PRO → SEEDANCE 2.5 · FORMAT 9:16 · 12 S · GENRE FOUND-FOOTAGE HORROR
Nobody is scared of a snake in a tank. Everybody is scared of a snake that was in a tank a second ago. That is the whole trick behind this video: the first eleven words of the image prompt do not describe a monster, they describe a smartphone — vertical, amateur, shot from behind a railing — and everything that follows is built to be believed before it is built to be dramatic. The keeper is mid-routine, the rat is dangling, one coil is “visibly tensed,” and the frame is already cluttered with a child's hand and strangers' sneakers. Once the audience accepts the boredom of the scene, the strike does the rest.
Two tools, two prompts. Nano Banana Pro locks the world into a single still that looks like it was pulled from a camera roll. Seedance 2.5 then treats that still as a contract — “Keep the start frame's lighting, colors, framing and the keeper's face unchanged” — and choreographs twelve seconds of chaos inside it, including the rescue, the splash and the audio of a woman saying “oh my god” on repeat.
THE PIPELINE AT A GLANCE
- 01
The believable still
Nano Banana Pro renders the pre-strike moment as a vertical iPhone frame: keeper, rat, tensed coil, railing, dirty concrete. The image is boring on purpose — it is the alibi for everything that happens next.
- 02
The twelve-second take
Seedance 2.5 receives the still as its start frame and a timecoded script: 0–3 s bait, 3–5 s strike, 5–9 s rescue, 9–12 s collapse and release. Handheld chaos, autofocus hunting and layered screaming are written into the prompt, not added in post.
STEP 01 · IMAGE — NANO BANANA PRO
Build the Alibi — the Pre-Strike Still
Everything in the video inherits from this frame, so the prompt spends most of its words on things that have nothing to do with the snake. It fixes the shooter (a visitor behind a waist-high railing), the light (overcast, under a corrugated roof, slightly underexposed in the pool), the dirt (algae streaks, water stains, a coiled hose, a plastic bucket) and the intruders at the edges of the frame (a child's hand, other visitors' sneakers). Those are the details a phone camera catches by accident and a render forgets.
Two lines carry the future action. “The coil nearest the keeper visibly tensed” gives the animal a loaded spring, and “The tensed coil and the dangling rat are ready to move” tells the image model to compose for motion that has not happened yet. Ask for the iPhone 15 Pro 26mm f/1.8 look and add the crisp “no filters, no studio polish” clause so the still doesn't arrive looking like an advert.
NANO BANANA PRO · IMAGE PROMPT
Vertical amateur smartphone video frame, shot by a visitor standing behind a waist-high metal railing at a reptile park, overcast daylight under a corrugated shade roof, dim humid enclosure with a shallow murky green pool below a low concrete viewing wall. A keeper in a dark green polo shirt kneels on the wet concrete edge, leaning far down over the wall, one bare forearm extended toward the water to hold a dead rat by the tail just above the surface. Beneath the rat, a very large green anaconda's head rests half-submerged, thick coils of its body looping through the shallow water and over a mossy rock, the coil nearest the keeper visibly tensed. Algae streaks and water stains run down the concrete wall, a coiled hose and a plastic bucket sit on the ledge. The railing bars and a child's hand gripping them intrude at the bottom of the frame, other visitors' sneakers visible at the top edge. The keeper's face is turned down toward the snake, concentrating, damp hair, natural skin texture. Composed like an iPhone 15 Pro 26mm f/1.8 shot, slightly tilted, keeper off-center, crisp sharp focus across the frame, clean HDR look, realistic muted greens and greys, slightly underexposed in the shaded pool, no filters. Clear separation between keeper's arm, wall and water. The tensed coil and the dangling rat are ready to move. No text, no watermark, no logo, no on-screen overlay, no extra arms, no deformed hands, no studio polish.
OUTPUT
STEP 02 · VIDEO — SEEDANCE 2.5 IN INVIDEO
Direct the Attack — One Take, Four Beats
Open Seedance 2.5 inside invideo, attach the Step 01 still as the start frame, and paste the prompt below. The first paragraph after the format line is a scene lock: it re-describes the still almost word for word and then closes with the sentence that does the heavy lifting — “Keep the start frame's lighting, colors, framing and the keeper's face unchanged.” Without it Seedance will happily redesign the keeper the moment he moves.
The action is written as four timecoded beats. Bait (0–3 s), strike (3–5 s), rescue (5–9 s), collapse and release (9–12 s). Each beat ends on a physical resting state — the rat drops into the water, a third pair of hands grabs a shoulder, the anaconda slides away under the green water — so the model always knows where a segment has to land before the next one begins. The final paragraph is the camera: shake at the strike, autofocus hunting between railing bars and keepers, rolling shutter wobble, exposure flicker. Then the audio, then the ban list.
REFERENCE INPUT — ATTACH AS THE START FRAME
SEEDANCE 2.5 · VIDEO PROMPT
Continuous single-take handheld vertical smartphone video, 12 seconds, no cuts. Scene lock from the start frame: dim humid reptile enclosure under a corrugated shade roof, algae-streaked concrete wall above a shallow murky green pool, a keeper in a dark green polo kneeling on the wet ledge leaning down with his bare forearm holding a dead rat over the water, a very large green anaconda coiled half-submerged below with one coil tensed, railing bars and a child's hand at the bottom of the frame, visitors' sneakers at the top edge. Keep the start frame's lighting, colors, framing and the keeper's face unchanged. 0-3s: The keeper dangles the rat, tapping it on the surface, the anaconda's head drifts closer, tongue flicking, coils shifting slowly under the water. The keeper glances up and says something to the visitors, then looks back down. 3-5s: The snake strikes upward in a blur, bites the keeper's forearm, and in the same motion a thick coil whips up over the wall edge and wraps his arm, yanking him forward so his chest slams onto the concrete lip, head and shoulders hanging over the pool. The rat drops into the water. 5-9s: The keeper braces his free hand against the wall and shouts, his legs kicking on the ledge. A second keeper in the same green polo sprints into frame from the right, grabs him by the belt and waist, and both pull backwards while the snake's body tightens and drags the trapped arm toward the water, the wet coil sliding on the concrete. A third pair of hands grabs the first keeper's shoulder. 9-12s: With a sudden lurch they all fall backwards onto the ledge in a pile, the anaconda releases and drops back into the pool with a heavy splash, its body sliding away under the green water. The camera stumbles back as the visitor retreats, framing tilting to the railing and back, finding the first keeper sitting up clutching his forearm, the second keeper on his knees, a child crying somewhere behind the phone. Camera shakes hard at the strike, framing slips and recovers, autofocus hunting between the railing bars and the keepers, rolling shutter wobble, slight exposure flicker under the shade roof. Ambient audio: echoing enclosure acoustics, a splash, men shouting "pull, pull", the metal railing rattling, a child screaming, a woman saying "oh my god" repeatedly. No music. No text, no overlay, no logo, no slow motion, no cinematic camera moves, no cuts.
OUTPUT
STEP 03
Anatomy — Why the Strike Feels Real
Seven decisions carry this video, and every one of them is a line you can point to in the prompts.
- 01
The format is the first sentence
“Continuous single-take handheld vertical smartphone video, 12 seconds, no cuts.” Before any snake appears, the model knows the container: one camera, one take, phone aspect, fixed length. Everything dramatic is then forced to happen inside a shape that cannot cheat with an edit.
- 02
Believability before drama
The image prompt spends its budget on hose, bucket, algae streaks, sneakers and a child's hand — the clutter a phone catches by accident. The horror works because the frame first convinces you nothing interesting is going to happen.
- 03
The scene lock
Seedance's second paragraph repeats the still almost verbatim, then demands the keeper's face, framing, colors and lighting stay unchanged. This is the identity clause: the start frame is a contract, not a suggestion.
- 04
Beats that end on a resting state
0–3 s, 3–5 s, 5–9 s, 9–12 s — and each block closes on a physical fact: the rat drops, hands grab a shoulder, the snake slides away. Endpoints give the model a target; without them motion smears across the whole clip.
- 05
Physics you can describe
“Chest slams onto the concrete lip,” “the wet coil sliding on the concrete,” “pull backwards while the snake's body tightens.” Forces, surfaces and directions — not adjectives — are what make a body look heavy and a snake look strong.
- 06
Camera failure as authenticity
Hard shake at the strike, autofocus hunting between railing bars and keepers, rolling shutter wobble, exposure flicker. A real phone would fail exactly here, so the prompt orders the failure. The ban on slow motion and cinematic moves protects it.
- 07
Sound as the second camera
Echoing enclosure, a splash, men shouting “pull, pull,” the railing rattling, a child screaming, a woman saying “oh my god” repeatedly, and “No music.” The audio describes a crowd we barely see — that is what sells the space behind the phone.
THE RESULT
Output — Twelve Seconds Nobody Will Believe Is Rendered
Check it against the four beats. The rat should touch the water before the strike, the strike should read as a blur rather than a slow lunge, the second keeper should enter from the right, and the clip should end on the first keeper sitting up with his forearm in his hand while the snake is already gone. If the face changes during the pull, tighten the scene-lock sentence; if the strike looks staged, the camera paragraph is doing too little — push the shake and the focus hunt harder, never the snake.
THE TAKEAWAY
Make the frame boring. Make the camera fail. Let the snake do the rest.
Swap the anaconda for a crocodile, a tiger, an escaped parrot or a very angry goose. Swap the keeper for a tour guide, a chef, a mascot. The skeleton carries any “it went wrong at the zoo” clip: one phone-real still with a loaded detail, one scene lock, four timecoded beats that each end on a physical fact, a camera that panics, and audio for the crowd you never see.
This video was generated with Seedance 2.5 inside invideo — the same workspace that runs Nano Banana Pro for the still. One place for the image, the start frame and the twelve-second take. Start with the link below.
WRITTEN, DIRECTED & PROMPTED BY DENIZ AKKABAK · @DENIZ.AKKABAK