Corrected entry: Near the end when Chandler is in a meeting, Stevens comes back later because he forgot his suitcase. If you look carefully, he picks up his suitcase and then puts it back down on the table on purpose. Also, when he leaves the room, you can see him turn around and hide out of shot waiting for his cue to come back in.
Corrected entry: At the fight Ross walks up with a very big drink and a even bigger tub of popcorn, however you never see it again after that shot. It can't be on the floor, they would have stepped on it, and considering the size of it, you should have been able to see it.Pam-I-am