Man...everybody is so smart calling the guy an idiot and dork etc. As if, none of you have ever come close to a potentially dangerous marine animal. Many people get hurt without even trying. So, he took a chance to entertain his group of divers...and lost a pinky. Regardless of what the 'wise-guys' are saying, it can happen to anyone.
Probably because we "wise-guys" try to give potentially dangerous marine animals plenty of room as opposed to harassing them. It isn't like this guy was swimming along and accidentally wandered into a fish's territory, he was really working hard at getting bit.
Besides, what right did he have to stress the fish to the point it bit him just to entertain some other divers?
I for one am VERY entertained by what happened and I didn't even have to be there to see it. I am thankful for video.