... "This jokes as 'old as the hills' but still funny".
There was a terrible bus accident that, sadly, no-one but a monkey survived. As the only witness to the event, the police questioned the monkey who seemed to respond using gestures.
The Police Chief questions the monkey, firstly asking "What were the people doing on the bus at the time of the accident?" In answer, to which, the monkey starts dancing.
The Chiefs says "Ok, so they were dancing but what else were they doing?" The monkey raises his hands and puts them to his mouth as if drinking from a bottle.
The Chief says "Oh, they were drinking, huh? Ok, were they doing anything else?" The monkey nods his head and moves his mouth gesturing they were talking.
The Chief, at this point, looses his patience and demands "OK, OK! So they were having a great time but just who, exactly, was driving the bus whilst all this was happening?"
The monkey cheerfully swings his arms to the side as if grabbing a wheel.