"Rick Holmes, who plays the 'Knight Who Says Ni,' made his entrance and said, 'Patriots 7, Giants 3 -- and Tom Petty is singing, "She was an American girl." Come on, let's go see if there's a wardrobe malfunction,'" a backstage source told the New York Daily News.

"When Rick returned a few scenes later as Tim the Enchanter, he said, in a thick Scottish brogue, 'Still 7 to 3 with five minutes to go in the third quarter -- and I saw Tom Petty's breast!'"

The hit show is based on the classic 1975 comedy film "Monty Python and the Holy Grail."