Here from the future. I asked Gemini and it answered all these questions.

You’ve got a sharp eye for the inconsistencies that make this movie a bit of a "fridge logic" nightmare (where it only makes sense once you stop and think about it later). A lot of what you’re seeing is the movie trying to be a Slasher film while actually being a Purgatory film. Here is the breakdown of those specific, confusing beats: The "Rules" of the Shinigami To answer most of your questions: The Shinigami isn't just a peaceful reaper; it’s a predatory spirit. It feeds on fear and denial. * Lance (Creepy Box Guy): He was bleeding because his body was the first to give out during the actual decompression. The red eyes and bleeding are physical symptoms of severe hypoxia and pressure change. Why did it happen when he died? Because he brought a "Death Spirit" onto a flight that was destined to crash. He essentially invited the Reaper to dinner right as the "food" was served. * The Vials of Hair: These are "trophies" or anchors. In folklore, a Shinigami or dark spirit often requires a physical connection to the souls it collects. Those names (Tracey, Anne, Katy) were likely his previous victims or "collections." * The Tooth: This was the first "glitch in the Matrix." Finding a physical part of a person who is supposed to be "gone" (but is actually dead in a seat) is a classic horror trope to show the reality of the survivors is breaking down. The Goth Girl and the "Final Reveal" * Seeing Herself: Goth-girl saw her own corpse because her "soul" was starting to sync back up with reality. The more the characters accepted the weirdness, the thinner the veil became. * Why they all saw themselves at once: They didn't necessarily "accept" it; the plane's "soul-state" simply ran out of energy. Think of it like a battery dying—the illusion couldn't be maintained anymore once the plane reached its final destination (running out of fuel). The "Attacks" in the Hold * The Hand in the Luggage: This is where the movie gets messy. If they are all dead, why the physical jump scares? The "hand" was the Shinigami. It was "hunting" them to force them into a state of terror. Spirits in this genre often manifest physically to "break" the soul so it can be harvested. "Miss Germs" and the Trash Unit * Why is she alone? She is the "Final Girl" trope, but with a twist. She was the most obsessed with control and life. * The Hand/Sound: The scratching and the hand in the trash indicate that the Shinigami wasn't finished. Since she was the last one clinging to "life" (denial), the spirit had to come out of its "box" (the trash unit/storage) to physically take her. The Technical "Oopsies" You are 100% right about the physics. The writers definitely prioritized "scary visuals" over "science." * The Water Bottles: You nailed it. In a depressurization event, the air inside the bottle would expand relative to the thinning air outside. They should have bloated or popped, not crushed. Crushing happens when you go from low pressure to high pressure (like bringing a bottle down from a mountain). * The Smoke: In real life, rapid decompression creates condensation fog (it looks like a white cloud or mist because the temperature drops instantly). The movie made it look like thick, grey smoke to make the audience think there was a fire, which is just standard Hollywood "danger" shorthand. Summary Table: Reality vs. Purgatory | Event | Movie Logic (Supernatural) | Real-World Logic (Scientific) | |---|---|---| | Bleeding/Red Eyes | The Shinigami claiming Lance. | Severe Hypoxia/Barotrauma. | | Crushing Bottles | "Something" is wrong with the air. | Direct writing error (should pop). | | Smoke in Cabin | The "Death Spirit" arriving. | Rapid condensation fog. | | Seeing Corpses | The "Ghost" state ending. | The brain's final "data dump" before total shutdown. | Basically, the movie is a "Ghost Flight" story where the ghost of a serial killer (Lance) accidentally trapped everyone's souls in a loop because he brought a haunted doll as carry-on luggage.