Phoebe's address is given as 5 Morton Street, about a five minute walk from the apartment on Grove and Bedford. However, previously, Monica and Rachel have stated that Phoebe lives much further away.
As she comes into Joey's apartment and sees Jessica, Rachel firmly shuts the door behind her. A moment later when she rushes out to tell Monica about Jessica, the door is partially open.
When Joey is talking to Jessica about her leaving the show, her right hand goes from holding a cigarette to a glass with no time to switch between shots.
Jessica's daughter fills her wine glass almost up to the brim and the level varies inconsistently in subsequent shots.
Technically, putting a brain into another body would not be a "brain transplant" as the body would have the brain's identify. It would be a "body transplant" if possible.
Susan Sarandon's character, Cecilia Monroe, says she has been on DOOL for 20 years, but doesn't know who Joey is (he was Dr. Drake Ramoray on the same show not long ago.). But the next time Cecilia sees Joey, at the craft table, she again asks his name. It's clear she's completely self-involved and probably doesn't know anything or anyone that doesn't directly affect her.
While Phoebe is singing along with Ross' bagpipe playing, Jennifer Aniston can be seen laughing and trying to disguise it.
Susan Sarandon walks away after throwing a drink and slapping Matt LeBlanc in the face, her slight smirk is noticeable.
Susan Sarandon is credited as having played Jessica Lockhart, but she was actually playing Cecilia Monroe, who plays Jessica Lockhart on Days of Our Lives (1965).
This is perhaps a silly observation given the preposterous nature of the soap opera plot, but with Jessica's brain, Dr. Drake Ramoray would no longer have any medical knowledge or skills.
At the 7:30 mark when Monica and Chandler go to the window to see Ross playing the bagpipes, you can see a person in the corner behind Chandler and Monica.
As with all the work-centered story lines concerning Joey playing Dr. Drake Ramoray on "Days Of Our Lives", that soap opera films in California, yet Joey and his friends are living in NYC.