4 baseball fans want to show their teams that they're each the biggest fans in the world, so they decide to climb the biggest mountain they can find.
The first one to the top is a Braves fan, and he says, "I'm the biggest fan in the world! This is for you Braves!" and he jumps off.
The second one to the top is a Mets fan and he says, "I love you more than anything Mets, this is for you!" and he jumps off.
The last 2 people who get to the top get there at the same time. One is a Red Sox fan and one is a Yankee fan. When they're both standing at the top together, the Red Sox fan says, "This one is for all baseball fans everywhere!"
And the Red Sox fan pushes the Yankee fan off.