"It's the quiet ones you gotta watch; this sounds to me like a very dangerous assumption..I will bet you anything that while you're watching a quiet one...a noisy one will fucking kill you! Suppose you're in a bar and one guy's sitting over on a side reading a book, not bothering anybody and another guys standing at the front with a machete banging on the bar saying 'I'll kill the next motherfucker who comes in here!' Who're you gunna watch?"