When Scorch signs his name to the floor it is revealed that many fictional characters have already "signed" their name as well. Among these are ALF (1986), Arthur, Barf, Bender, Beta Ray Bill, Bucky O'Hare, Chewie, Dr. Hephaestus, E.T. - L'extra-terrestre (1982), EVA, Gazoo, Godzilla (1954), Goku, Gonzo, Gozer, Greedo, HAL-9000, IO, Johnny-5, Kal-El, Khan, Kerrigan, Klaatu, Leeloo, Lion-O, Marvin, Mew, Mork, Mulder, Nessie, Odo, Paul, Ratchet, Riddick, Ripley, Santa, Spock, Stitch, Sue, The Thing, Tinkey Winkey, Venom, WALL·E (2008), Wicket, Yogurt, Zaphod Beeblebrox, Zartog, Zeus, Zim, and Zuul.
When Gary's pod reaches Earth, and is out of control, the sound of R2-D2 from the Star Wars movies can be heard mixed in with the sound of the ship's engines.
The trio of aliens (who landed on Shanker's dad), the music near the end of the movie, Scouse accent's (from Liverpool), harmonic sneezing, and final comment "Let's not ever break up guys!" is a tribute to the Beatles.