Other mistake: A fast editing makes a double kick on the face all the more impressive not to mention impossible. Get the pause button ready. (01:08:00)
Other mistake: The bad guy burning clearly has his face and hands protected. (01:22:00)
Other mistake: At the board meeting near the beginning, it's noticeable that there is a smoky haze in the room, and this is also very noticeable in several close-up scenes, where this smoke haze can be seen wafting behind them. It's far too thick and too prevalent to be considered steam from the coffee, however no-one appears to be smoking, and there's not even an ashtray on the table.
Answer: In the scene before that he scraped and cut his arm on the file cabinet as he was closing it looking for information.