When Abed enters the apartment Troy is sitting at the table examining a sandwich. The position of the sandwich changes between camera angles, moving between Troy's hand and the plate.
Abed, "I just want my friends and I to have a merry Christmas together" should be "I just want my friends and me to have a merry Christmas together."
Shirley says to Troy "You Jehova Wittnesses... so severe." The correct name is Jehova's Wittnesses. Shirley would really know this.