John McClane’s fall down the elevator shaft was an accident

Ok, maybe more of an error on set that seemed to work out better for the film. In the scene where McClane jumps into an elevator shaft, the stunt man was supposed to grab onto the first vent, but he didn’t quite grab it. Ok, not even didn’t quite, he missed it by a mile. But it made the footage that much more exciting to watch, so the editors kept it in the final cut.