When Tim Allen's character refers to the policeman (Kurtwood Smith) shooting at the store he references "Robocop". in which Smith played one of the antagonists.
In the beginning Vincent D'Onofrio's character is reading a "Big'Uns" magazine--Al Bundy's magazine of choice on "Married...With Children" (1987).
When Dax Sheppard's character says "I could work as a negotiator" His boss says "This isn't a movie, you're not Samuel Jackson" Samuel Jackson was also in a movie "The Negotiator" where he was a negotiator himself.
Jessica Alba was a victim and Dax Shepard was the instigator during an episode of the first season of Ashton Kutcher's "Punk'd"; Kurtwood Smith and Kutcher also starred together in "That 70's Show" (1998).