Golf fans are very familiar with the par-three 12th at Augusta National. It sits precariously on the banks of Rae's Creek.
A player cannot afford to be short here. Any ball not reaching the back two-thirds of the green is in danger of rolling back down the shaved bank and into the creek.
The green slopes severely down to the front, and even a putt struck too firmly is in danger of running off the front and into Rae's Creek.
Although it is the shortest hole on the golf course at 155 yards, it plays the second toughest to an average of 3.3 shots per player.
The middle hole in "Amen Corner" is subject to the swirling winds and presents a small margin of error for a golfer.
Especially when tensions are high and the green jacket is on the line on Sunday afternoon.