The Double Take
In comedies and musicals of the 1930s, the double take was king as a laugh getter. In Shall We Dance, everybody does them.
But, in this movie, the best are done by Eric Blore (you're thinking, "I KNOW that face, but I don't know who he is!") and by probably the best movie double taker ever, Edward Everett Horton.
Stupid!?! I never called you stupid! To call you stupid would be an insult to stupid people!