When Little Mo (Sammy Davis Jr.) is talking to Max (Gregory Hines) and first shouts out "Challenge" to the other dancers, he is wearing a white do-rag on his head. As the dancers run up and join him in the dance room, he is suddenly wearing a hat instead.
When Jimmy Slyde finishes his set during the challenge dance, he winds up on the opposite side of the room from Little Mo and stays there. But when Little Mo reacts to the set-up of Harold Nicholas' jump, Slyde is standing next to him again.