Perhaps one of the last few people on Earth you would want to be mad at you is Mike Tyson.
This dude found out the hard way after he was on an airplane with the former heavyweight champion and was seated directly behind Iron Mike.
Apparently, the dude kept pestering Tyson, started rapping obnoxiously loud, and wanted some up close and personal time and an autograph from Tyson.
Well, it seems Mike had enough and basically uses his gifts and starts pummeling the dude in the head with punches.
Sure enough, the next thing you know the dude is bleeding from the side of his forehead.
Please don't irritate Mike Tyson.