Al Pacino as Dr. Jack Gramm and Benjamin McKenzie as Mike Stemp in '88:88 Minutes'

The former O.C. star had to ride towards Pacino, and break sharply during one particular scene - and the novice biker was so nervous during failed takes, it prompted a concerned Pacino to call in his stand-in.

McKenzie explains, "I had to learn to ride, and I was absolutely convinced I would screw up and hit the gas when I was supposed to hit the breaks and kill Pacino.

"I would forever be known as that kid from that TV show who killed one of the greatest actors.

"I think he was aware of this and, after a couple of takes of me failing, decided that his stunt double was better for the shot."

Source: WENN