I knew the Rangers probably weren't going to win the 2010 World Series when the laws of physics were abandoned in San Francisco when Ian Kinsler hit a sure home run to center field in Game 2 only to have it bounce off the literal top of the wall and carom back into play for a double despite that being impossible.
I know the Giants were destined to win the 2010 World Series because Edgar Renteria popped up a routine can of corn that somehow carried forever for a home run off Cliff Lee in a season when he hit three home runs all year.