Here's a short (20 second) shot of Mr. Grundy dancing. He's a Black man in a jockey outfit and there's someone in a horse costume dancing next to him. Quite obviously, this is part of a stage act, and someone at Edison's motion picture unit saw the show, thought "That'd be worth filming" and they did. There's another short of Mr. Grundy doing the Cake Walk, released in the same year. I surmise it was from the same show.
Although I thought I knew what to expect before I started the film, I found Mr. Grundy's version of the buck & wing far more extreme than the variants I was used to. However, given that the people who demonstrated it to me had learned it some time after 1930, a change in meaning is hardly surprising. Grundy's performance is a lot of fun.
