Create a 15-second ultra-cinematic, photorealistic disaster sequence beginning during a peaceful sunny afternoon at a bustling coastal city harbor before an enormous tsunami suddenly devastates the entire waterfront. The camera must remain in one continuous fluid shot with no cuts. 0-3 sec: Begin gliding through a crowded waterfront market. Tourists photograph fishing boats. Restaurant workers serve seafood. Seagulls circle above parked cars. A yellow delivery truck drives along the coastal road. The camera follows the truck as the ocean suddenly retreats, leaving boats stranded on exposed mud. 3-6 sec: People turn toward the horizon. A colossal dark wall of water rises beyond the harbor. Fishing boats tilt violently. Harbor warning sirens activate. The camera accelerates beside the truck as pedestrians begin running inland. 6-9 sec: The tsunami smashes into the harbor. Fishing vessels launch over the seawall. Shipping containers tumble across roads. Restaurant terraces explode beneath surging water. A massive cargo ship crashes sideways into the waterfront buildings. 9-12 sec: The truck races toward an elevated highway. Water floods intersections beneath it. Cars, buses, streetlights, market stalls, and boats collide in churning debris. A towering port crane collapses across the harbor behind the moving camera. 12-15 sec EPIC CLIMAX: The camera swings ahead of the truck as it reaches higher ground. Behind it, a gigantic ocean surge overwhelms entire city blocks. The camera cranes vertically into an enormous aerial reveal. Skyscraper reflections vanish beneath foaming water, cargo ships drift between buildings, and the waterfront disappears under the advancing tsunami. Style: terrifying natural scale, realistic hydrodynamics, believable floating debris, everyday coastal life interrupted, immense water simulation, seamless one-shot cinematography, photorealistic destruction, 4K, 16:9.