WTF people!? He knows what he is doing ... he was not as close to terrifyingly falling off the cliff shot as as some of you think, IMHO. If you are a golfer, you know you don't hit a shot like that and fall forward...ESPECIALLY a pro.
As a geologist I can tell you that was pretty dangerous. The cliff behind him did not have grass which means it slumped off, the grass in front of him has a shadow which indicates a void. I would get my caddie stand on that location before me.
Getting shot anywhere, much less on the side of a cliff, is terrifying. Just ask JR Ewing or John Brady.