On "Pyramid", Gene ends up going to the Winner's Circle with Joey after winning round two. However, the two did not play on the same team for that round. Gene would have gone to the Winner's Circle with Leslie Charleson, who was his partner for that round.
In "Pyramid", every category that is played does not last for exactly 20 seconds. Additionally, the Winner's Circle round does not last for 60 seconds, either.
When Rachel and Monica are dancing in the flashback, they are both holding cups. It is obvious that nothing is in the cups, but Rachel drinks from hers as Monica fetches the pizza. There isn't enough time for her to fill her cup even when she is not in the shot.
Officer Goodbody (Danny DeVito) wears what looks to be an NYPD Officer uniform when he does his dance. However his shoulder pads and badge are different from when he originally arrives at the apartment.
The fat suit Monica is wearing underneath her clothes is visible on her ankle when she falls into the bean bag at the end.