The worst I've done was at a Bush Gardens theme park. I managed to exit the park at the wrong entrance. Now you'd think I'm going to say I couldn't find my car, but it was worse. In an area approximating the one where I parked my pickup truk was one that was nearly its twin. I was standing there trying to figure out why my key didn't work any more when the owner came up and asked why I was trying to break into his truck. At first I said it was my truck, but then I looked at the licence plates (out of state). I apologized and told him that mine was exactly like it. I don't think he really believed me. After another 10 minutes of wandering, I realized I was in the wrong lot. I caught a shuttle bus to the right one, located my truck, and my key fit.