Before the game begins, politicians, athletes, celebrities and occasionally fans are given the opportunity to throw out the first pitch.
There are obviously nerves for each of these people, as they have to throw the pitch in front of as many as 50,000 people. It is just like having a 60' 6" game of catch, but that is not easy for everyone.
Some people manage to throw a strike to the catcher. Others, however, come nowhere close to delivering the ball to home plate.