Monica is sick for the duration of the preceding episode. At the beginning of this episode she appears to be healthy, though only two and a half hours have passed.
Chandler, Monica and Joey move to the kitchen and Joey starts talking about how he was mad at Chandler for 10 years for making out with his sister. Behind Joey, the plant, television set and entertainment center are missing, yet later in the episode it all magically shows up again.
Chandler, Monica, Phoebe and Joey are watching E.T. As they discuss sad things, the movie's music is playing. Monica suddenly gets off the couch to get the photo album and the music has abruptly stopped and there is nothing on the screen.
When Rachel and Jill are arguing at Central Perk about dating Ross, the positions of sticks in Jill's hair changes between shots.
When Rachel, Ross, Monica and Chandler are watching the video they think Phoebe is starring in, after the vampire comes out of the coffin, and the camera is in front of Joey, you can see the TV screen is all black, as if it is off. The very next shot is a scene from the move being played from that same TV.
When the gang is watching Phoebe's porn movie, in one shot you can see the TV is not turned on.
In the very beginning when Joey grabs some chips and walks over to Rachel and says "I didn't know we could date your sister", just off to the left you can see someone's arm/elbow (probably a crew member) appear on screen and disappear again.
In "TOW Old Yeller Dies" (2.20), Phoebe talks about how when her mother was still alive, she would turn off the TV during sad endings of movies, and then tell Phoebe some alternate happy ending. In that episode, "Bambi" was one of the examples which she mentioned which had a happy ending to it. In this episode, however, part of the gang (including Phoebe) is watching "ET" and they're crying and talking about how sad it is. Then, Phoebe mentions that "Bambi was sadder because she was crying "for three days after that movie [Bambi]. No, wait, two 'cause on the third day, my mother killed herself..."
It is stated that Chandler hasn't cried since he was younger, though he has been shown crying several times throughout the series.
Watching Ursula's porn video, the gang is trying to see something on her leg, but Ursula keeps moving. For some reason, it doesn't occur to anyone to use the remote to pause the video.
When Joey says he punished Chandler for 10 years after he kissed his sister, Chandler says "that was like 5 years ago". Chandler kissed Joey's sister in season 3, ''The One Where Chandler Can't Remember Which Sister'' which would've been only 3 years ago.
In this episode, Joey tries to hide the fact that he is stealing food from Monica and Chandler. However, he is very open about eating their food in every other season, and they are also very open in knowing that he DOES steal their food.