Corrected entry: Will Sawyer climbs the framework of a construction crane to get above the fire on the 96th floor. Even without a prosthetic leg, it would have taken a very long time, which isn't accounted for in the time flow of events.
Corrected entry: When the lead character and main villain are fighting at the end, they have a conversation where the villain thinks the hero is standing in front of him because of a mirror. However, if the villain could hear him speak, he'd know the hero was behind him.
Correction: The crane was on the top of the building, where Will arrived via elevator. He only climbed 10-15 floors up, not 96.