(Video courtesy of IronForgesIron) Our friend ZombieProphet from IronForgesIron.com always comes through with videos of shows and events we forgot about and the UFC 137 countdown show that aired last night is no exception. Cesar Gracie has some interesting observations about BJ Penn and he refers to the former UFC lightweight and welterweight champ as Superman, but says that his protegee Nick Diaz is the Hawaiian scrapper’s kryptonite. I don’t know about you guys, but this fight gives me goosebu…