This joke was in the humor column in the local Portland newspaper today. It's about Chicago sports teams.
Five Chicago sports fans, each one representing one of the five Chicago major league teams, climb a mountain to show their team loyalty. The first one yells, "This is for the Blackhawks - Stanley Cup champs" and jumps off the mountain. The second one yells, "This is for the Bulls - the greatest team of the 90s" and he jumps off the mountain. The third one yells, "This is for DA BEARS AND DA COACH" and he also jumps off the mountain. The fourth one yells, "This is for the White Sox and the Great South Side" and he throws the Cub fan off the mountain.
If you grew up in Chicago like I did, this would make perfect sense.