In Season 1, TOW the Candy Hearts, at the beginning, Ross sees a hot girl from his apartment that had once given him an egg. Joey and Chandler tell him to return her egg to get a date and he does. When he comes back to them with a date, he hugs Chandler and smashes the egg. Before hugging him, you can see Ross opening and closing his hands revealing that he's not holding an egg. I know they wouldn't actually make David Schwimmer smash an egg on Matthew Perry, but they should have noticed this; I notice it everytime and it drives me crazy!