Dave told me about this one yesterday. Common courtesy should be returned with a little common courtesy. Let's say you're pulling into a parking lot or a gas station with your vehicle, and there's some people walking about to cross in front of you. You could probably speed up and make it past them, but the nice thing to do is to stop and wait for them, since they are pedestrians. Problem: they take their DAMN SWEET TIME walking in front of you. As a rule, if somebody waits for me, I usually acknowledge them, smile, mouth the word "thanks" and then scurry across quickly as a courtesy back. Anybody who walks slowly and lollygags in this fashion as if he is the King of England deserves to be run over three times slowly by my car, then screamed at for 14 minutes.