If Jaws made us not want to go into the ocean, then Alfred Hitchcock's Psycho is the film that made us never want to shower ever, ever again. A tense, noir mystery ride in a rundown hotel, it was a much needed injection of terror into an otherwise swinging '60s.
And, with over half a century of gestation, Psycho still rates highly on the all time top movie lists and still every bit as spoil-your-pants scary now as it was then. But just how well do you know it? Take the quiz and find out - but do be aware that if you don't score at least 15 out of 20, a madman with a knife will join you in the shower tomorrow* morning**.
**It might be the afternoon