This was an odd episode. I'm still not sure how much I liked it. Sure, it was funny, but it was also just plain weird. Bender was strange during the episode, and I'm not really sure how much I liked the plot or the episode. It WAS funny, as all episodes of Futurama are, though.
Since this episode is impossible for ME to describe, I will just allow TV.com to describe it for me:
While at the movies, Bender accidentally knocks out a champion of the Ultimate Robot Fighting League. He then enters the world of pro wrestling, discovering that the competition is rigged and the most popular robot always wins. Bender's career soars until he is asked to lose his next fight to an up-and-coming robot.