A friend of mine picked up a hire car at the airport in Johannesburg, on entering the carpark he was met by someone dressed similarly to the rental company staff. He was asked for the bay number of the car he was picking up which was entered into the person's mobile phone. On arrival at the car this person made a quick inspection for damage and left. Whilst driving away from the airport my mate noticed two things, firstly one of the rear tyres was going flat and secondly he was being followed.
Luckily he made it to a police station while the car was still driveable. Most people would have simply pulled over to change the wheel and been robbed or murdered.