10 Best Movie Twists You Genuinely Never Saw Coming

While there's admittedly a fair chance you know the twist in Alfred Hitchcock's Psycho whether you've seen the movie or not, that speaks more to how utterly unexpected it is to the blissfully unaware.

Hitchcock's thriller is centered around the shocking demise of Marion Crane (Janet Leigh), who is stabbed to death in the shower at the Bates Motel by a figure implied to be Norma Bates, the mentally deranged mother of the motel's owner Norman (Anthony Perkins).

Eventually, though, we learn that Norma died many years prior, her mummified corpse found in the motel's cellar, before we see that Norman has been committing the murders himself while dressed up as his own mother, wig and all.

The film's infamously expository finale lays out all the facts, that Norman jealously killed his mother and her lover a decade prior, then mummified her corpse and has been living with it ever since.

Worse still, he's created an alternate personality of his mother in his mind, who is triggered to act out with jealous, murderous rage whenever Norman is attracted to a woman.

As well known as the twist is today, it still leaves a bruising impact, and one can scarcely begin to imagine what audiences thought of it over 60 years ago.