Growing0ldDisgracefully
Years ago but I unlocked and got into a car in the supermarket (old car not with remote lock). Couldn't work out why the key didn't fit the ignition, then realised I'd got into someone else's car, the same colour as mine and parked a couple of bays away from mine! Oops!
Collected a friend from the airport in the dark and loaded up the Renault with her motley collection of bags etc, only realising were in the wrong car as I tried to drive off. We hastily moved ourselves and our stuff into the correct car and we're about to drive off when my friend realised one of her carrier bags was missing.... I nipped back to find the owner of the car holding the bag at arms length in confusion. Having listened to my garbled apology, she demanded to know what colour my car was. On learning it was pale gold, she haughtily informed me: "Well, mine is GREEN, revved up her car and a screeched off before I could point out that all cars are gray at night!....