Oh, c'mon, Juan. You're asking tsuwm how he knew!? That's like asking Babe Ruth how he knew where and when to swing the bat!

Or Mickey Mantle when they asked him how he hit his fabled 565 foot "tape measure" home run: "Well, I'll tell ya," he said, "I had a real bad hangover and I was standin' at the plate and looked up and saw two balls comin' at me, and I swung at one of 'em."