Running Pants gag?

[BathTub]

What is the source of the running pants length gag?

[Plastic Self-Cleaning Duck]

Is it in the sample?  I can't remember that one.  Just the thing about how they're burning books....

[Steve-O]

Yeah, for some reason a running pants gag slips my mind as well.  I would have suspected it was related to the live online short where Kevin was wearing "girl pants", but that didn't happen until 1/09, and DOT was released 9/08.