What, how can you put people out? That's crazy... Is it the airblast?
EDIT: So you can use that to put people out. XD
Oh yeah, and once I was on a server and there was only maybe 4 people, and someone is on the voice chat saying "You guys want to play rocketball"? And I had no idea what he meant so they showed me...
You need two Pyros on opposite teams, and one Soldier. The pyros stand at a distance facing right at one another. The soldier fires a rocket and the Pyros have to push it back and forth with the airblast, until someone misses it too many times and blows up. It's just hilarious. And then the fourth guy came in and tried to win the capture points because he was annoyed at us.