Line and speed are the two factors that determine whether or not a putt goes in the hole.
Often times, two putts that are practically next to each other have rather different paths to the bottom of the cup. That's what Pinehurst golf instructor Kelly Mitchum demonstrated in a cool trick performed at the North Carolina resort.
Mitchum lines up three balls, each subsequent one slightly in front of and outside the ball behind it. Then he hits the back ball first, down to the front ball, sending each ball on a different path to the hole. He spectacularly makes all three of them. It's a thing of beauty.