My husband got the huge drink after polishing his regular size Coke off twice. This prompted our server to stand on a chair behind dh and give him the huge glass you see in someone's picture above. After the glass presentation, he called for everyone to be quiet and said, "Please keep your children away from this man. He has a Coke problem." I laughed until I was in tears.
This antic was followed up by the ketchup bringing and taking, a backflip by a waiter to stop a kid from crying after she dropped her plate in the floor, and some cell phone antics.
I think it is important to remember that if you are going to WCC and want the antics, you must go at dinner. They do not 'perform' at lunch. Also, when you check in tell the host/hostess that you want a waitperson who is in FULL character. This should help you get the antics you are looking for.