They say a picture is worth a thousand words, but that's not exactly true when it comes to tour player swings. A golf swing is a complex combination of moving elements, and how those elements work together separates major champions from 90-shooters. We asked Golf Digest 50 Best Teacher Mike Jacobs to help break down some close-up images of eight great players to explain what exactly you can see in the swing—and what's hidden below the surface.