Things get so serious this week on Glee . Rachel, Kurt, and Santana have been like Three's Company (in a good way) out in New York, but the claws come out when Santana auditions to be Rachel's understudy for Funny Girl. They get into it and Santana, in turn, gets mean, saying, "You are short, you are awful, and that is never gonna change." Rachel snaps and with a big windup, she smacks Santana across the face. Watch it again (and again) below. Pretend there's sound. Ka-pow!