I had this customer that got totally irate with me. We were stuck in traffic and the customer was in a hurry. "Why did you go this way?! You IDIOT! I'm going to be SO LATE", he fumed. I let him say what he had to say, staring forward at the cars ahead of us. Then, I turned around to look at him. "I'm sorry you are so angry at the traffic. But by hiring me to take you from one place to another, you have become part of the traffic."