Towards the end of "Rebel Without a Date", Nicole tells Casper that he reminds her of her boyfriend, Jean-Claude. This is most likely referring to action stars Jean-Claude Van Damme and Casper Van Dien.
Cemetery Gag: Tom Presley, R.I.P., "Hey, who turned the lights out", The Worms Go In, The Worms Go Out, Ghosts are from Crypts, Ghouls are from Mausoleums, Dee Kay, Dustin Ashes, Howe Mc Cob, and The End.