Scent of a Woman
This 1992 movie follows a prep schoolboy that is tasked with caring for a blind veteran. Al Pacino wanted to do right by his role, so he practiced going blind by unfocusing his eyes as much as possible. Well, he got a little too good at this and it started happening without his doing! One of these times, he walked straight into a trash can, which of course made it into the final film. How could it not?