The Concerned Anthropologist
The river takes them downstream, and in the eve of the of the second day, they hear the distant sound of drums. Being of a very nervous disposition, Charles is disturbed by the sound of the drums and asks the guide, "What are those drums?"
The guide replies, "Drums OK, but VERY BAD when they stop."
Then, after a few hours, the drums suddenly stop! Charles becomes as nervous as hell. Charles shouts at the guide: "The Drums have stopped, what now?"
The guide bends down, covers his head with his hands and says, "Bass Solo".