Sake bombs:  What annoying, twenty two year-old girls (who believe they are debutante-cultured and sophisticated because they know how to use chopsticks [unlike their parents who are still in Youngstown, OH]) HAVE to do, EVERY time they eat sushi and disrupt the tranquility of the restaurant.  The worst is when they decide to do the trick (that they learned at Syracuse, Vanderbilt, Boulder or another collegiate factory specializing in producing sloppy females) where they balance the sake on chopsticks over the Sapporo and scream and pound the table to mix the alcohol.  The whole scene makes you wish the sushi chef would mix some arsenic into their wasabi and end the bastardization of Japanese culture.