For anyone who's tried to play golf, they come to understands and appreciate the difficulty of what Tiger accomplished with his chip shot. It was a matter of under or over shooting the shot, because of the grade of the green near the hole.
Undershoot, and he'd have a difficult shot with the put, because of the gravity roll that may turn out into a disaster from the miss and roll down the hill. Same for the overshoot that would continue to roll down the hill, and make it a more difficult shot putting up the hill.
Instead, he got it in the hole.