Recently I was stuck in a traffic jam, a passenger in a car inching along up to my destination. I was startled by a loud honking to my right, and when I instinctively turned to the noise, I was aghast to see the angry honker's car bumping into the car in front of him!

"How could that driver be so impatient that he would try to nudge the other car with his bumper!" I thought. "Can't he see that we're in a traffic jam that stretches as far as the eye can see?!"

I rolled down my window to give the offending driver a piece of my mind. But he told me something that reminded me that things aren't always as they seem:

"The guy in front of me wasn't paying attention, and his car started rolling backwards into mine!"