The external shot shows the name of the spa as "The Good Face Spa", but Chidi, Tahani, and Jianyu all wear green robes that are embroidered "Kingdom Calm Spa".
(at around 17 mins) Michael asks Janet for his hoodie, and he slips it on. It goes from him pulling it on to flipping the hood up, and the front is already zipped without him ever touching the zipper.
(at around 16 mins) When Janet gives Michael a single page of paper with the list of "people on garbage duty", she puts her hands behind her back. A few seconds later, she reaches back and, in the bottom-left corner of the screen, a crew member's hand gives her a large pile of paper with the list of "people flying" for the next scene.
(at around 16 mins) Michael and Eleanor are trying to figure out what caused the trash rain. They ask Janet for a list of people who attended the party; after that Janet is handed a stack of papers, in the very bottom right of the frame, that she then hands over to Eleanor and Michael.
After watching all ten seasons of Friends (1994), Michael expresses confusion as to how Monica and Rachel were able to afford the apartment. Actually, the show explained more than once than Monica was illegally subletting it from her grandmother.