Create a 15-second ultra-cinematic, photorealistic disaster sequence beginning during a beautiful sunny afternoon in a densely populated Mediterranean coastal city before a colossal volcano erupts violently above the skyline. The camera must remain in one continuous fluid shot with no cuts. 0-3 sec: Begin gliding through a lively seaside boulevard. Tourists photograph colorful buildings. Waiters serve coffee beneath striped umbrellas. Scooters weave between parked cars. A small yellow delivery van drives beside the waterfront. The camera follows the van as a distant mountain begins releasing an enormous dark smoke column. 3-6 sec: A deafening volcanic explosion shakes the city. Windows vibrate. Coffee cups fall from tables. A gigantic mushroom-shaped ash cloud expands above the volcano. Glowing volcanic projectiles arc across the distant mountainside. People abandon cafés and flee. 6-9 sec: Powerful earthquake tremors fracture the boulevard. Building facades crumble. Streetlights fall across traffic. Thick volcanic ash begins raining onto rooftops. The van accelerates through a shower of glass and masonry. 9-12 sec: A massive pyroclastic density current pours down the distant mountain slopes. A highway overpass buckles behind the van. Vehicles collide as visibility disappears beneath swirling ash. The camera races beside the van as the advancing volcanic cloud overwhelms the outer neighborhoods. 12-15 sec EPIC CLIMAX: The camera swings ahead of the van and cranes dramatically upward. Behind it, a colossal volcanic eruption column towers kilometers into the atmosphere. The mountain releases another enormous explosive blast. Glowing debris rains across the outskirts while a vast ash cloud rolls toward the coastal city. The camera rises to reveal the entire metropolis beneath an expanding volcanic storm. Style: believable volcanic physics, monumental geological destruction, realistic ash and debris, Mediterranean urban detail, terrifying natural scale, continuous immersive camera movement, photorealistic 4K, 16:9.