With his hand in the cow, Colt says to Rooster "You can't see it, but I'm flipping you the bird right now." In That '70s Show (1998) episode Misty Mountain Hop (2003) Kelso (played by Ashton Kutcher) says the same thing to Hyde (played by Danny Masterson) while his hand is stuck in a vase.
This episode features the only occasion where Beau calls Rooster by his real name, Jameson.