I once borrowed my neighbours Porsche 911 as a means to impress a material girl on a date.
Everything went fine and smooth and we skip to the moment after dinner, I offer her a ride home, she said yes.
We walk out the door to the street, I put my key in the black Porsche and the door won't open. I try again, again, again and again. I try the other door. For around 10min I'm feverishly trying to get into the car, I had gathered quite a crowd of onlookers when I'm suddenly approached by a men who asks what I'm doing with his car, I explain it's my car but the lock doesn't work.
He then points at a black Porsche 911 parked two spots away and says: "I think that's yours."
That was the most embarrassing 20m walk of my life as everyone laughed. The girl didn't like it either.