18 Movies With the Most Insane Plot Twists Ever (No Spoilers!)

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Psycho (1960)

Paramount Pictures/Universal Pictures

This Alfred Hithcock classic completely shocked viewers at the time. For a movie as early as 1960, it was terrifying and audiences were shocked when star Janet Leigh was killed in the first thirty minutes of the film.
But that isn't even the big twist. That one happens towards the end when the true personality of Janet's killer is shockingly revealed.