Question: Why didn't Sam die after being stabbed/drowned/chopped in half? I have no idea.
Question: Why do they have a girl on the cover of the DVD holding a knife behind her back (and I'm sure it's Penelope) when the killer is a guy?
Answer: Fairly standard misinformation tactic. You'd prefer they revealed the actual killer on the cover?
Answer: This is a joke referring to the numerous slasher movies where the killer survives all most anything and still comes back. Like when the killer is killed of in the end of the movie but then reappears in the sequel.
Andreas[DK]