Continuity mistake: When Cory is following the lions' traces he gets off the sled with gloves on, then he makes the gesture of taking them off (not actually showing). The close up shows him with no gloves on, then wearing them, then not wearing them. (00:12:00)
Continuity mistake: When Jane shoots the guy in the trailer, there is no blood on the wall behind him as he slides down. When she approaches him and removes the shotgun, streaks of blood appear.