(at around 41 mins) Willow is seen hanging a poster in her dorm for Oz's band "Dingoes Ate My Baby."
Xander says "Hit the girl with your best shot, then 'hasta'". This is a reference to a famous catchphrase associated with Arnold Schwarzenegger's character, from the 1991 film Terminator 2: Judgment Day. The full quote is: "Hasta la vista, baby" (Spanish), meaning "See you, baby". Xander calling Buffy the "Buffinator" is also a reference to the Terminator film series, as well as Oz saying "He'll be back". I'll be back" is the catchphrase from The Terminator (1984).
Xander says: "Are you saying that Buffy's been doing a Linda Blair on us". Actress Linda Blair, first came to prominence with her portrayal of Regan MacNeil, in the film The Exorcist (1973). She experiences demonic possession in the movie.
Parker says "We sort of got caught up talking Red Wings". This refers to the Detroit Red Wings, a professional ice hockey team.
In the original script, the song Kathy plays over and over was "Butterfly" by Mariah Carey, instead of "Believe" by Cher.