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. the Extra-Terrestrial (1982), EVA, Gazoo, Gojira (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.
Whenever two names of the hazmat guys are said in succession, they match up with the names of famous directors or actors, e.g. a hazmat says: "Peter! Jackson! Detain him!", "George! Lucas! Let's go!", "Christopher! Nolan! On your feet!", "James! Cameron! Don't let him get away!", and during the food fight "Bruce" then "Willis." Relevant links: Peter Jackson, George Lucas, Christopher Nolan, James Cameron, and Bruce Willis.
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.
The logo painted on the trucks that take Gary to the secret military compund says "51 Flavors". This iis not only a nod to "Area 51" (the worst keptsecret military base in the middle of the Nevada desert), but it is also a nod to Baskin-Robbins who boasts they have "31 Flavors".