The Wild One (1953)
"What are you rebelling against?" asks a girl of Marlon Brando's surly biker Johnny Strabler. "What've you got?" he replies.
As a film, The Wild One is a bit of a feeble effort – two rival biker gangs clash in a town full of closed-minded locals, while Brando woos local girl Kathie. So far, so rote. But the image of Brando astride his Triumph Thunderbird became an icon of youthful rebellion, casting a long shadow over pop culture.