When Darnell is injured and Joy has him in a wagon, Darnell says,"Mambo dogface to the banana patch." That is from a '70s Steve Martin routine.
At one point Randy tells Earl, "I'd like to be the pervy doctor on Vacaciones en el mar (1977)". The "pervy doctor" was played by Bernie Kopell, who later appeared in this series in the episode Pinky (2009).