(don't try this at home, it's very exhausting)

One of my friends own an old Fiat Panda. This isn't a very heavy car so you CAN carry it with four persons.
Now what we did was the following:
This special friend was driving to the pub we normally met, and was soon engaged in a long chatter with a girl. We used this half-an-hour to "rearrange" the parking of his car by carrying it around the corner in another street! It was vey funny to see him searching his car with finally nearly calling the police to notify that it was stolen (but we convinced him that no-one would steal his car - not if he could also take an BMW 3). After a while, some of us "discovered" the car "by accident".
I think up until his moment he's still thinking that he had simply forgotten were he parked and we were just to drunk to remember.