Humor found somewhere else on the Internet. 
Four baseball fans, each from a Major League city,  are climbing a mountain. On the way to the top,  each is arguing about how loyal they are to  their  team, and what they would do for their  team.
As the climb progresses, the odds increase. Upon  reaching the top, the Red Sox fan shouts, “This  is for the Sox!” and hurls himself off the top. 
Not to be outdone, the Braves fan yells, “I love  Atlanta- this is for the Braves!” and he jumps  off, too. 
A moment goes by… Suddenly the Mets fan shouts,  “This is for everybody!” and pushes the Yankees  fan off.