Revealing mistake: When Bruce Willis is in the hospital, the doctor comes up to him and asks Bruce to look at him. The doctor proceeds to get a torch out and shine it into his eyes. Yet there is no light coming out of the torch. (00:10:25)
Revealing mistake: When Bruce Willis bumps the guy in the stadium with the gun in his pants he has one of his "flashes" and the camera zooms in in slow motion to the side of his face. You can see that his ear is pierced. He must be "breakable" if he has a hole in him.
Suggested correction: The 'unbreakableness' of Bruce Willis' character is that his bones cannot break. (According to the explanation given by S. Jackson's character) His skin can be punctured and so forth. If every part of him was invulnerable he couldn't shave or do many bodily processes.
His unbreakableness does extend to his skin. This is first seen in the hospital when David wakes up in the hospital and the doctor tells him he doesn't have a scratch on him. The second time is during the flashback scene of a teenage Audrey and David both ending up in an automobile accident and Audrey being shown bruised, scratched and bleeding and David completely unharmed.