The Episode Where The Other Friends Could Have Made Cameos
The episode where Joey is going to be on The Tonight Show was probably the easiest episode for any of the other Friends characters to make a guest appearance on. They could have showed Jay Leno interviewing Joey and then cut to show Chandler and Monica, Phoebe and Mike, or Ross and Rachel watching him on the show. Its a shame none of them ever made an appearance even though David Schimmer directed like three episodes.
You'll have to speak up I'm wearing a towel.