Some movie deaths are signposted; you know the man in the black hat is going to get his comeuppance a mile off, and it's just a case of enjoying the ride until he meets his maker. But some – well, some we just weren't expecting...

Possibly Alfred Hitchcock's most famous movie , Psycho saw Janet Leigh playing a secretary on the run after embezzling money from her employer. Holed up in a motel run by the creepy Norman Bates (Anthony Perkins), she takes a shower after a tense dinner, only to be brutally stabbed to death by Norman's mother. It's a shocker...