Steve Tartalia, James Marsters' stunt double, says he knocked himself out during the last scene, in which Buffy and Spike fall through the ceiling. "On that fall," he says, "our legs got tangled in the breakaway ceiling, and it caused us to tilt at an angle so that my head would be the first thing to hit the ground. And it did, and it knocked me out. Basically, I came to with some flashlights and smelling salts." Stunt coordinator John Medlen also hurt himself during this episode, while demonstrating how Spike should swing from the chandelier. The chandelier broke, he fell 7 feet, and the chandelier landed on his face, breaking his nose.
In his DVD commentary, writer Drew Z. Greenberg says that in his original conception of Willow's confrontation with the homophobic men at the Bronze, he intended for Willow to cast a spell on the men so that they couldn't stop kissing each other. Joss Whedon vetoed the idea because he did not want to portray people's sexual orientation as changing in an instant and he did not want to portray same-sex kissing as a punishment.
The statue of Janus that Ethan Rayne used to turn everyone into their Halloween costumes in Halloween (1997) can be seen on top of a shelf in the Magic Box behind Buffy.
Amy says she wants to ask Larry to the prom, only to be informed by Willow of his death (and that he was gay). Larry was killed by Mayor Richard Wilkins in the Season 3 finale Graduation Day: Part 2 (1999), when he broke his neck with a tail whip.
The nerds talk about Red Dwarf (1988) and Doctor Who (1963) - Andrew claims to have seen every episode of the latter, but not all of the former as it isn't out on DVD yet. While only about a quarter of the total Doctor Who serials have been released on DVD (and indeed, some serials don't even exist in the BBC archives anymore), he could have watched them on VHS cassette. James Marsters would later go on to have a recurring role in the Doctor Who (2005) spin-off Torchwood (2006).