Not only one of the funniest scenes in the history of the show, but one of the funniest comedy moments of all time!
http://www.youtube.com/watch?v=ZFuniFSP2fo
However, I just learned that this whole scene between Archie and Meathead was ad-libbed! (According to an interview with Rob Reiner, the scene with Meathead putting on his shoes was supposed to happen, but Rob actually always put his shoes on "the stupid way" in real life!) Carol yelled at him for that, and the tape just kept rolling!!!
Jack