Easily the funniest moment for me is the episode with Joe, who gained 10 pounds in between weighins, and tried to tell the doctor he was just eating 2 small sandwiches a day and that's it. And the doctor just levelled him with a look and in a dry voice goes "come on now joe, that's mathematically impossible". That scentence has made its way into my family and friend's lingo, so when someone is full of shit we just go "cmon now joe"