I don't know if you've heard of "Bros icing bros"—it's a meme that's come out of fraternity houses and now been spread everywhere by YouTube (and a short-lived website shut down by a cease-and-desist from Smirnoff). The idea, such as it is, is that you surprise a bro with a bottle of Smirnoff Ice and he must immediately, on pain of, I dunno, being called a wuss or whatever, drop to one knee and chug the bottle.

The sad thing, as this footage from the British Cinema Institute shows, is that this is all a modern degraded form of a much more civilized custom. (Astonishingly for such an old film, you can watch it in HD.)