Time to recycle this old one ...
Tonto and the Lone Ranger are out in the wild somewhere, listening to the war drums in the distance.
Tonto (staring at the horizon): Must go now, kemosabe. Drums have stopped. When drums stop, very bad.
Lone Ranger: Why, Tonto? What bad thing happens after the drums stop?
Tonto (pauses and turns to Lone Ranger): ... Bass solo.