Continuity mistake: Peter dives through the window of the attic, shattering it with shards of glass and window frame busting out and falling with him. When the camera pans down to him lying on the ground, there isn't a single shard of glass or piece of frame seen anywhere. (01:56:10)
Continuity mistake: At the dinner scene, just before Peter asks his mother if she's okay, the meat on his plate, (apparently chicken) is sitting with the mounted end up. It cuts to his mother then back to him without him moving, and suddenly the meat has flipped upside down the other way. And it flips around several times through this scene. (00:56:55 - 00:58:00)
Continuity mistake: In the classroom when Peter is being possessed, he slams his face down into his desk twice, splattering blood onto it. After he falls back screaming, the camera changes angles and now his desk is clear of blood. (01:38:25)
Answer: There were supernatural forces at work, so basic rules of human anatomy and physics don't really apply in the situation.
Phaneron ★