There are a lot of ways to classify what makes a shot great. What was the degree of difficulty? How big of a spot was it in? Well, all of these shots were hit on the game's biggest stage, at the U.S. Open. We couldn't put them in any specific order, because how can you compare a 210 yard shot to a 60-foot putt? Here's a look at what we believe to be the greatest shots in U.S. Open History.