Was out of town when this forum went up so I'm glad I have the honor of making the first post:
This is a pretty long one (about eight minutes, I think). It shows Powergirl completely dominating a male opponent in a ring. I like to think of it as some sort of intergalactic fighting tournament where she has to take on an alien dude much bigger than her. The fate of earth hangs in the balance...
Note: There's more of these from this same user that I'll get around to posting in this thread eventually.