机窗视角拍到海底异常物的片段

Create a 30-second ultra-photorealistic smartphone video recorded by a passenger looking out of an airplane window during a normal daytime flight. The footage must look completely authentic and accidental: handheld phone camera, imperfect framing, slight window reflections, subtle autofocus changes, realistic airplane vibration, natural exposure, compression, ordinary clouds and realistic atmospheric haze. STRUCTURE: 0–9 SECONDS — ORDINARY The passenger casually films the view outside the airplane window. Blue sky, layers of clouds and ocean far below. The airplane wing is partially visible. Everything looks completely normal and boring. 9–14 SECONDS — SLIGHTLY STRANGE Something unusual becomes visible far below through a gap in the clouds. At first it looks like an unusual circular patch in the ocean. The person filming slowly tilts and zooms the phone toward it. 14–21 SECONDS — WTF As the camera zooms in, the circular area becomes clearer. Something enormous appears to be moving beneath the surface. Do NOT clearly reveal what it is. For a brief moment, the water reveals the outline of an enormous perfectly geometric structure beneath the ocean, far too large to be a normal ship or island. The passenger becomes increasingly confused and instinctively adjusts the phone framing. 21–27 SECONDS — IMPOSSIBLE The clouds begin moving across the view. Just before the object disappears behind the clouds, a huge section of the underwater structure subtly moves. The movement must make the viewer realize this isn't an island or geological formation. It is something enormous beneath the ocean. The passenger quietly says, naturally and uncertainly: “What the hell is that?” No dramatic acting. 27–30 SECONDS — CUT The clouds completely obscure the view. The passenger tries to reposition the camera, but the video abruptly ends. Make the anomaly extremely difficult to identify at first. The viewer should initially think they are watching ordinary airplane footage. CRITICAL REALISM: No cinematic color grading, no fantasy lighting, no giant obvious monster, no science-fiction aesthetic, no exaggerated VFX. Everything should look like authentic phone footage someone accidentally captured from an airplane. The viewer's progression should feel like: “Nice clouds.” → “Wait, what's that?” → “Is that something underwater?” → “That can't be real.” → replay. No subtitles, no explanatory text, no music.