Joel, Nick and Andy refer American composer and pianist John Tesh as one of their own: a caveman.
When Andy and Nick are checking the mail, Andy is holding a ribbed noodle. The scene cuts to Andy and Nick walking into their apartment and Andy is holding a round noodle.
When Thorne calls him, Andy is glazing a ham: a reference to "The Cavewoman" when Andy mentions his personal obsession with the "Great Ham Craze of '96."
The car Andy drives is a VW, but the logo is taped off.