In case you don't know what a Big Lipped Alligator Moment is, this video explains it pretty well.
VIDEO http://www.youtube.com/watch?v=WJRBPlnBg24 It is basically a completely pointless scene that randomly popps up out of nowhere, has nothing to do with the plot, is completely pointless, and is never mentioned again once the scene is over.
The video above gives several great examples including:
The singing alligator from All Dogs Go to Heaven
(for which Big Lipped Alligator Monents are names) The creepy tunnel scene from Willy Wonka
The pink elephants from Dumbo
Other examples include:
The horrible rapping dog from that crappy Animated Titanic Musicle
(Then again that entire movie was a Big Lipped Alligator Moment) The scene in Spider-Man 3 where Emo Peter Parker is dancing down the street
(It meets all the qualifications: Over the top, completely random, adds nothing to the plot, and most importantly, is never mentioned again) The scene in Return of the Jedi where the freaky dancers are dancing and singing at Jabba the Hutt's palace.