Look at the highlight for Alex Rios' 2-run jack. Especially during 0:41 to 0:45 seconds. That's why it's important for you to size up the other fans around you when you reach your seats. Questions like "if a home run reaches here, is this guy in front of me capable of catching it? If he doesn't, could the ball ricochet and hit me square in the noggin??" should come to mind.