SAN FRANCISCO — Buster Posey gave it the old college try when he was asked what it felt like to have Prince Fielder's many pounds barreling down the third base line toward him in the early innings of a scoreless World Series game. But the San Francisco Giants catcher quickly failed in trying to describe the indescribable. "Umm, you want to try to make sure you're light on your feet," Posey said after the Giants' 2-0 win over Detroit in Thursday's Game 2 of the World Series. "And, umm ... just .. uh … I don't know ... You just have to be there to know what it's like."