Jake Gyllenhaal's five pounds of "Prince of Persia" muscle haven't gone to his head

Entertainment Tonight crashed the set of the upcoming action epic Prince of Persia, which of course stars honorary gay Jake Gyllenhaal in the lead role. The discussion of course soon turned to the remarkable body transformation that the Brokeback Mountain star made in preparation for the role, but Jake assures us that it's simply five pounds of muscle and that he can't wait to get fat once shooting is over.

That's cool with us, Jake. Bears are totally in!

Check out the clip after the break, but be warned, it may lead you to actually attempt sexual congress with your computer screen.