here is the video,
http://www.youtube.com/watch?v=DUfmf...relmfu#t=1m22s

the song lasts about 10 seconds. I searched Google for a soundtrack to the movie and for lyrics and haven't found an answer.

lyrics...
"lets go and have some fun
(something something) take another (run? one?)
lets three peat (feat? deat?)"

it definitely sounds like a Sublime or a reel big fish type of band. But I don't think it is either of those two.