Henry Winkler, who plays Barry the lawyer, is shown near the end of the episode looking into a mirror about to comb his hair and does a "Hey" sort of shrug. Henry played "Fonzie" back in the 70s/80s who was a greaser who combed his hair and did the "Eyyyy" catchphrase.
In the "Next Time on..." segment there is a Bluth Cornballer sitting in a corner of Maggie (Julia Louis-Dreyfus)'s kitchen.
David Cross had publicly mocked James Lipton (Warden Gentles) as part of his stand-up act, referring to Lipton as "pretentious" and "the most pompous, arrogant failure in history." Lipton was not amused by Cross' impersonations of himself, but during filming, they ended up becoming friends (although Cross maintained his criticism of Lipton's show, Inside the Actors Studio (1994)).