First, lock the initial frame to a realistic one. I've used GPT Image 2.5 and the prompt below:

DIRECTIVE:
Produce one still that reads as a real in-car dashcam frame grabbed from a moving car on a highway. Optical dashcam capture, wide windshield view, windshield glass, A-pillar, a slice of dashboard/hood — lived-in dashcam JPEG, not cinema, not HDR.

BEAT / COMPOSITION:
Looking forward through the windshield. On the LEFT side of the road (left lane or left shoulder, clearly in frame): TWO branded trucks close together.

PEPSI TRUCK (LEFT, CRITICAL):
A full-size Pepsi tanker / delivery truck, official Pepsi blue livery and logos readable. It has a breakdown: a torn ragged hole in the tank wall. A thick, heavy jet of dark-brown Pepsi cola is blasting out of that hole onto the asphalt — lots of liquid, puddle spreading, foam, spray in the air, wet road shine. The truck is stopped or crawling, hazard situation.

MENTOS TRUCK (BESIDE IT, CRITICAL):
Right next to the Pepsi truck (same left cluster, slightly ahead or alongside): a closed box truck / delivery truck with large, unmistakable MENTOS branding on the side (Mentos logo, candy rolls artwork). Rear and side doors CLOSED. No candy spilling. You can clearly read that it is a Mentos truck.

CAMERA PACK:
Fixed dashcam behind the windshield, slight barrel wide, dashboard or hood bottom of frame, windshield dirt/reflections, timestamp overlay optional, daytime road, other traffic farther ahead. Real consumer dashcam still.

LIGHT:
Daylight, overcast or sun, real road color, cola looking like dark soda not black oil.

PHOTOGRAPHIC CHARACTER:
Unstaged dashcam grab — physically grounded trucks, readable brands, the leak is the event.

Once it's ready, use it as reference for Seedance 2.5 and this prompt:

[STYLE + CAMERA + ATMOSPHERE]
Vertical 3:4 smartphone video filmed FROM INSIDE a moving car, passenger or driver seat. Phone held handheld (not a bolted dashcam): arms, slight breathing shake, windshield and A-pillar in frame, a slice of dashboard/hood at the bottom, maybe a finger edge. We are ARRIVING — forward motion first, trucks growing larger, then we slow and stop short of the cola lake. CONTINUOUS SINGLE TAKE the entire 15s. Digital pinch-zooms only (no cuts): punch into the Pepsi jet, the jug fill, the Mentos doors, the launch, then zoom out as he shrinks to the horizon. Daylight, overcast, wet asphalt, rain specks on glass. Consumer phone JPEG, autofocus hunting, rolling shutter. Photoreal live physics: cola viscosity, foam, Mentos cases, one adult body launched like a Mentos rocket.

LOCKED SET / VEHICLES:
- LEFT ahead through the windshield: blue Pepsi tanker with a ragged hole, dark-brown Pepsi cola ALREADY blasting onto the lane, spreading cola lake.
- BESIDE it: Mentos box truck, rear doors CLOSED at arrival, Mentos livery readable ("mentos / The Freshmaker").
- Highway continuing past them toward a clear vanishing-point horizon.
- NO other truck for the guy. He does not exit a vehicle.

LOCKED CAST:
- THE GUY: one very large man alone — sweat-dark tank top, cargo shorts, stained baseball cap, Alabama redneck energy. No second person. He ENTERS FRAME FROM THE RIGHT (shoulder / right edge of the windshield view) already on foot — he does not get out of any truck, van, or car.
- HERO OBJECT: one giant gas-station plastic jug / Big Gulp–scale cup in his right hand. Starts EMPTY (daylight visible through clear plastic), stays in that hand until the blast.

Diegetic audio: road noise while arriving, cola hiss, gulping, metal latch, volcanic foam roar, Doppler scream as he flies away, phone mic clipping.

[IMAGE REFERENCES]
[ref_image] = locked opening phone still from inside the car looking through the windshield at the Pepsi tanker + Mentos truck cluster. Tanker, hole, cola jet, Mentos truck, and in-car foreground are LAW. Clip BEGINS with us still rolling toward that cluster.

[TIMELINE SECOND BY SECOND]

0-2s: [HOOK — ARRIVING + ZOOM]
Phone already rolling. Road noise. Through the windshield the Pepsi tanker and Mentos truck are already ahead on the left; cola ALREADY jetting from the hole. We close distance — trucks grow. Digital zoom punches into the Pepsi stream and the hole. By ~2s brakes dip and we stop.

2-4s: [STOP + HE ENTERS FROM RIGHT]
We fully stop. Idle phone shake. Zoom out a notch. THE GUY walks INTO FRAME FROM THE RIGHT — already on foot from the shoulder / right edge, giant EMPTY jug held high, clear plastic with daylight through it. He does not exit any vehicle. He steps straight into the cola lake toward the tanker jet.

4-6s: [FILL — HOLD IT]
He shoves the empty jug INTO the Pepsi stream. ONE CONTACT: jug into the jet. Phone slam-zooms the fill and HOLDS. For a clear moment the jug is visibly filling under the blast — dark-brown cola climbing the plastic, foam boiling over the rim, overflowing his forearm, stream hammering the mouth of the jug. Only then does he pull the full heavy jug out and raise it.

6-8s: [CHUG]
He tilts and CHUGS — huge gulps, cola down the tank top. Empties most of it, gasps, still holding the jug. Turns to the Mentos rear doors. Phone zooms out enough to keep tanker jet + Mentos bumper + him in frame.

8-10s: [OPEN + DUMP]
ONE CONTACT: he yanks both Mentos rear doors open. Cases stacked high. He dumps a case — Mentos rolls cascade into the cola lake. Packs split, white mints into the brown river. Digital zoom on the mint waterfall hitting the puddle. He still stands in the lake with the jug.

10-12s: [IT GOES]
Hard fizz, then a WHITE FOAM COLUMN erupts between the trucks. ONE CONTACT: the fountain hits him from below like a human Mentos rocket. Feet leave asphalt. Jug flies. He launches UP and AWAY down the highway axis. Phone slam-zooms his body leaving the ground, then struggles to track him.

12-14s: [HUMAN FOUNTAIN / SHRINKS]
He is a dark silhouette riding the white column, spinning once, cap gone. The geyser leans him toward the open highway horizon. Foam hits our windshield — phone jerks but stays inside the car, still filming through glass. He becomes a tiny spinning figure on a white spray trail.

14-15s: [PAYOFF — GONE]
Phone holds on the vanishing point as he dwindles to a speck and DISAPPEARS into the horizon haze. Foam still climbing between the trucks, Mentos doors still open, Pepsi still dumping.

[STYLE & QUALITY BOOSTERS]
Photoreal handheld phone from inside a car, 3:4 vertical. Arriving motion then stop. Digital pinch-zooms only, continuous take. One man enters from the RIGHT on foot — never exits a vehicle. Empty jug fills on camera clearly before drinking. Body launched to the vanishing point. Coherent liquid physics. Identity lock to [ref_image] for both trucks, the hole, and the in-car windshield framing.