When I first got to Japan, I was told to put stuff - briefcase, papers, whatever - on the passenger seat. Since the drive's side is the opposite side of the car, ALL newbies went to the wrong side of the car for a while. Having something in the passenger seat you could "look through" made it look like it was intentional. At least to you.
Also, whenever you came to an intersection, you could tell the newbie - the wipers would come on, go off, then the turn signal would go on. The stalks were reversed on the column, so that took a while to get used to as well.
Also while in Japan I "stole" a car. The floor supervisor handed me her keys and said it was the silver Subaru and sent me to the BX for sandwiches for lunch. She sent another Airman with me. Now this guy had ridden in with her that morning, so when I went out into the parking lot and found the Silver Subaru, we got in. The key didn't want to turn at first, but finally with a little force, we got it started. Drove out to the BX, came back. Had a little more trouble with the key, but got it out. When we walked in, she asked why we didn't take her car. Apparently she was parked in the back lot. You'd think the guy she sent with me would have known that. Never did find out who's car I took that day.