At 16:04 the menu on the board behind the janitor reads, 'Deserts' rather than 'Desserts'. Below that it lists the following: ME, BILEBERRY, PEACH N CREAM, BLUE N BERRY. And below that, the drinks listed are HOT CARLS, HI DE, HI.
Dr. Reid tells Dr. Turk there is "no place place called Kokomo". There are actually 5 places in the US called Kokomo, including one in Hawaii where Dr. Reid wants to go.
After Carla and Elliot talk to JD about his insensitive remark to Kim in the cafeteria, the Janitor converses with JD. Behind the Janitor is a blackboard with that day's food menu which incorrectly spells "desserts" as "deserts".