The other player putted. Zach's caddy was busy raking the sand trap, so didn't notice what was happening on the green. Zach lined up carefully, hit the ball into the center of the cup and got ready to celebrate.
The marshall stopped the celebration. It seems Zach forgot he marked his ball and didn't put it back on the spot it was before he marked it. That's a no-no in the rules of golf. "Two stroke penalty", yelled the marshall. Fortunately Zach had a 3 stroke lead to work with, so he still won. But that was a close call.
After you learn how to swing a club, the most difficult part of the golf game is focus and concentration. In the meditations I'm writing for the Chopra Center, we call that "present moment awareness.".
The moral question, of course is, why didn't someone remind Zach he had to move his ball back. My pro golfer friends tell me it's quite cutthroat out there.
What's the take-away? Stay in the moment, focus on what you are doing, not on what's going to happen next, and life won't hand you surprises you don't want.