Jack Noseworthy (Randy) and Katie Wright (Tanya) did not know they were half-siblings until they met on the set of this movie.
This is the same hand that appears in the Addams Family (1991) as Thing played by magician Christopher Hart
The school gym where the Halloween dance is held is the same gym used for the high school gym in the Buffy the Vampire Slayer movie and Jawbreaker (1999).
In September 2007, Seth Green told The Onion AV Club about the experience of filming Idle Hands: "The best thing about that movie was that everybody working on it had a different mission statement. We all thought we were making a different movie. Me and the boys-the other actors, Devin and Elden--we were convinced we were making a high drama with some comedic elements, and we tried to make our relationship as lifelong best friends believable...The director, Rodman [Flender], was attempting to make a throwback Italian horror film, like a Dario Argento flick. The writers really wanted it to be Heathers. And the studio was listening to the test marketing and saying that...they really wanted the zombies to be cuter, and have more wacky antics, and apparently all the kids in the audience thought that there should be more pot-smoking, that pot should save the day, and somewhere, somehow, Jessica Alba needed to get her top ripped off. And that's how that whole new ending got shot, where she's up on the car lift and gets her midsection ripped off, and pot saves the day. Like I build a giant bong out of a carburetor."
Tom DeLonge: The Blink-182 guitarist plays the drive-thru employee wearing a safari hat who says "Alright!"