Someone know what South Park episode this is?

I saw a ridiculous South Park episode on TV some time ago. Stan and Kyle and Cartman and everyone in their cl were making a play for some thing on the school. Another cl were also making a play, and they were trying to make the best play. You saw ers run in a really silly way through the corridor and in a hurry to tell his cl that he have seen some of the other cl' play and they are awesome. It all ends with the other cl' play is really crap after all. Someone remember this? Its not a new episode, back a few seasons.