Which side is your fuel filler on?

[Roddez]

I appologise for the American terms used in this joke...

I was getting gas at the pump when an elderly lady and her grandson drove up next to me in her car. Her grandson hopped out to pump the gas for her, and noticed that the pump was on the left side of the car, but the gas door was on the right. When he told her, she started the car back up, made a U-turn, and drove to the OTHER side of the pump, leaving her in the same situation she started with. When her grandson told her this, she started yelling at him, saying, "You said it was on the wrong side LAST time! Make up your mind!"