A gorilla walks into a bar and says "A scotch on the rocks, please". The gorilla hands the bartender a $20 note. The bartender thinks to himself 'this gorilla doesn't know the prices of drinks' and gives him $2 change. The bartender says "You know, we don't get too many gorillas in here". The gorilla replies "Well, at $18 a drink, I ain't coming back, either".