The self-aware horror series "Scream," which returns to theaters this weekend with its latest installment, taught us the rules of horror films ("Never say, 'I'll be right back!'"), but there are plenty of mistakes people still make. Read on if you want to live.

The self-aware horror series "Scream," which returns to theaters this weekend with its latest installment, taught us the rules of horror films ("Never say, 'I'll be right back!'"), but there are plenty of mistakes people still make. Read on if you want to live.