I would say that this was literally a "Hey ya'll watch this" moment. I don't think it went as planned. How much money would you have to be making to stick your head in a living (and somewhat angry) crocodile's open mouth?

flicker/x_pixels

This is obviously a show that this person has done before. This time maybe the crocodile had a bad day, or was hungry, or was just tired of playing the fool. I can tell you that it was a pretty dumb idea. I bet that the guy in the video would agree with me now. I hope he was OK. Please do not try this with an alligator.