What's most disturbing though is that he slowed down immediately after the ball moved. He had to be looking right at the ball. He had to know it moved. And to not call the penalty on himself seems like of shitty. Definitely not the same way a lot of other professionals would have handled it.
Karma is a funny thing. If he had called the penalty on himself, he probably would have felt a lot better about things, then chipped it in on his next shot.