Cinematic alpine realism, cold blue-white natural light with warm amber from the train's cab interior. Persistent atmospheric haze and snow particulate throughout. The red cog train is a vintage narrow-gauge locomotive with weathered paint, brass fittings, and visible steam — it must remain visually identical across every shot. Otto is a stocky older man in a dark wool coat and engineer's cap, oil-stained gloves, grey stubble. Clara is lean and sharp-featured, wearing a tan mountaineering jacket, rope coiled at her hip, wind-burned skin. Both characters maintain consistent wardrobe, build, and facial features throughout. The alpine environment is sheer grey granite, ice-glazed rock faces, and a narrow carved ledge with no guardrail — the drop is thousands of feet. Snow texture transitions from a distant breaking shelf to a fast-moving white plume to violent close-range powder blast. Camera movement should feel weighted and physical, never floaty — as if shot from a helicopter and handheld rig. Seamless continuity of light direction, weather intensity, and train position on the ledge from cut to cut.Opening shot: An extreme high aerial over a vast Alpine cliff face, revealing the terrifying scale — a tiny red cog train crawling along a ledge barely wider than the rails themselves. The camera plunges downward in a dramatic dive toward the train. Far above on the ridgeline, a massive wind-loaded snow shelf fractures and collapses, sending a wall of white angling down toward the ledge.Cut to a wide lateral profile of the full ledge section, the mountain wall on one side, the abyss on the other, and the approaching avalanche visible as a churning white plume funneling through the rock channels above. Clara leans urgently through the cab window, hair whipping, shouting to Otto: "Next turnout is two bends out — if we stop here, we're buried alive."Cut to the cab interior, medium close on Otto at the controls. The space is tight, trembling with engine vibration, steam hissing from old valves. His jaw is set, hands locked on the throttle lever. Otto: "This engine was not built for sprinting."Clara, braced in the doorframe behind him: "Today it is." He shoves the throttle forward. The gears engage with a heavy mechanical clack and the pistons accelerate.Cut to a fast low tracking shot skimming along the cliff wall inches from the rock, the granite face rushing past in aggressive parallax. Snow dust begins hitting the ledge in sharp bursts, visibility thinning. The camera swings outward and arcs upward into an overhead angle, revealing what lies ahead — a short widened pocket carved into the mountainside, the turnout, their only chance. Final shot: Ultra-wide overhead orbit as the cog train surges into the turnout and tucks tight against the rock. A half-second later, the full avalanche roars through the main ledge line like a white freight train, snow spilling over the cliff edge in a massive frozen waterfall. The camera pulls up and wide as the white torrent streams past just inches from the sheltered train, the cliff dropping into void below, Otto and Clara holding still in their tiny pocket of safety while the mountain empties itself around them.