An anthropologist is visiting a primitive society. One night, he hears drums beating in the distance. Concerned, he asks one of the tribesmen what's up with the drums. The native says "Drums ok, but if drums stop very bad — run away."
The drums beat on for an hour. Still uneasy, the anthropologist asks again if everything will be alright. And again, the native replies "Drums ok, but if drums stop very bad -- run away."
After another hour, the drums stop. The native stops dead in his tracks and looks up and shouts "Drums stop! Very bad! Run away!"
Scared now, the anthropologist asks what happens next.
The native replies "Bass solo!"