For people who are confused, the original Big Lipped Alligator moment. It's random, freakish, pointless, ridiculous, and has nothing to do with the film at all.

I don't have much to say about alleged BLA moments myself: they're entertaining enough whether they have a point or not, as long as the movie is good. Sometimes it's difficult to judge the significance of a scene and if the film really needs it or not.