I used to work at a car dealership. One day I had to use a bay in a different building because my usual workplace was occupied. The other building had a lift that I hadn't used before.

Anyways, I drove the car onto the lift, got out and placed the arms of the lift under the jacking points like I had done a thousand times before. I raised the lift a little and checked if the placement was still correct. It looked good, so I raised the car to a medium height. When I looked again, I realized that this lift had a central platform that was also raised and was set about 20 centimeters higher than the four arms that usually lift the car.

This 90.000 Euro SUV was basically balancing on a 180x50cm piece of metal right in the center. I managed to lower it down safely but my pulse goes up just thinking about that day.