I love Whatever happened to baby Jane too but my all time favourite is still Hitchcock's Psycho.
Over his career, Hitchcock had always flouted Hollywood’s production code those rigid rules that had been in place since the 1930s that prohibited onscreen nudity, *** and violence. Nowhere is Hitchcock’s brazen censor-defying clearer than in Psycho’s “shower scene”.
Marion steps into the shower, a shadowy figure rips back the curtain, and cinema’s most visceral scene unspools, brutally, before our very eyes.
Hitchcock, the master of suspense, never actually shows knife slicing flesh. Everything is implied, through liberal doses of chocolate sauce, hacked watermelons, Bernard Herrmann’s screeching violins, and Leigh’s blood-curdling screams.
In one 60-second scene, Hitchcock shatters all the rules. It’s the most famous of all bait and switches: you expect one thing, but get another. Up to that point, no film had killed off its lead character so early in the story (nowadays, such an audacious twist shows up everywhere, from The Lion King to Games of Thrones). As Leigh slides down the blinding white tiles, arm outstretched, a new kind of cinema is born: twisted, shocking, primal.