Emmett Miller appeared in a 1951 film, "Yes Sir, Mr. Bones." An hour long, it tells the tale of a young boy who strays into a retirement home for elderly minstrel performers. Flashbacks allow the film (which actually exists on DVD) to recreate some of the old skits, including this excerpt from YouTube. Here Emmett Miller, now in his 50s and wearing his trademark bowler hat, gives a lesson in blackboard logic.