"Excuse me, sir," he said politely to a well-dressed, middle-aged man walking along the street, "but can you tell me where Times Square is at?"
The man turned up his nose, looked at him, and said, "I don't know where you are from, but here in New York we speak proper English -- you don't end a sentence with a preposition like that!"
"I'm sorry," George said, extremely embarrassed and apologetic, "Can you tell me where Times Square is at, asshole?"