The infamous vomit scene from Stand By Me lands on this list because it’s gross and also a feat of choreography. The nastiness occurs at a pie-eating contest where a fat kid, mockingly called “Lard Ass,” gets revenge on the people who have picked on him throughout his life. After drinking a bottle of castor oil, eating a raw egg, and finishing off five whole pies, he unleashes a deluge of blueberry vomit on his fellow competitors.
After witnessing this, the other contestants begin projectile vomiting all over themselves and each other. We assume this is what 'Nam was like, but instead of the guts of teenage Marines, people were being covered by half-digested baked goods. This is about as close to choreographed, synchronized hurling as you’re going to get.