In the family picture in Principal Gardner's home office, the woman in the photo is Robert Downey Jr.'s wife Susan Downey.
The most memorable song in the film is Cat Stevens' "If You Want to Sing Out, Sing Out". This song was also used repeatedly in Harold und Maude (1971), another movie about a wealthy, but troubled young man.
Charlie's limo is a classic 1969 Mercedes-Benz Pullman, one of only two hundred ever built.
The band playing at the party, is a real-life band called "Spiral Beach". They provided three songs for the soundtrack.
No actors are given credit for playing Murphy's (Tyler Hilton) first three video victims: Bart Bannister (victim #1), Terry Gotham (victim #2), and Phuc Nguyen (victim #3). Nor is there on-screen credit for George the Bartender.