During the production of The Dark KnightRises, Christopher Nolan was very much impressed with Tom Hardy, whose face was covered with a mask. After that the director decided that the actor just needed his eyes to be seen to deliver the character. That’s why, we can mostly only see only Tom’s eyes in Dunkirk.
In the last Bruce Lee movie, Game of Death, there is a scene when a villain changes blank bullets to actual ones to get rid of Bruce Lee’s character. In 1993, Bruce Lee’s son Brandon was shot by Michael Massee from a 44 caliber revolver during the production of The Crow. The real bullet in the barrel was unnoticed by the shooting crew and was released with a shot striking Lee in his stomach.