Andy Samberg (Jake) and Akiva Schaffer (Brett) are best friends in real life. They also members of the band The Lonely Island.
Jake tells Holt he's "basically the guy in Ghostbusters (1984) who lets all the ghosts out." That character, a secondary villain, was played by William Atherton, who Jake and Amy mentioned previously when discussing who was the greatest secondary villain of the Die Hard (1988) franchise. Atherton played a similarly unlikable character in both Die Hard and Die Hard 2 (1990).
Gina inadvertently causes a water pipe to burst, then says, à la Steve Urkel: "Did I do that?" and then credits popular family sitcom "Family Matters" (1989), the show in which Urkel was featured. This marks the second straight episode to reference the 90s sitcom. In "Bachelor/ette Party" (2018), Terry tells guest star Reginald VelJohnson (who starred in Family Matters as police officer Carl Winslow) that his performance in the series is what made him want to be a cop.
Speed Racer, also known as Mach GoGoGo, is a Japanese manga and anime franchise. A live action movie was made with the same name. It bombed at the box office and nominated for a Golden Raspberry Awards. It has now garnered a cult following.