Conor McGregor knows how to move the needle – and look a little crazy while doing it.

Here are 15 examples of that.

1. The skinny days

(Gary A. Vasquez-USA TODAY Sports)

McGregor always looked a little nuts when he had to drop a bunch of weight to fight at 145 pounds. This was taken before his title fight with Jose Aldo at UFC 194, a fight McGregor needed just 13 seconds to win.