The vocational school I went to only had the real old style in ground lifts that had one huge piston with a pair of arms on the top,two of them ,one lifted the front of the car,the other one the rear,and they had two control levers ,you had to manipulate them to get each end to raise up the same amount--it was difficult to see what the rear one was doing,the controls were mounted on the floor in front of the vehicle!..
More than once a student lifted a car up and let the rear raise way up compared to the front,and the car slid forward off the lift arms and crashed them into the oil pan or transmission--if they hadn't jammed there,the car could slide right off both lift pistons and land on the guy operating the controls..
I was surprised they even allowed that type of lift to be installed in a shop class..but I guess they were popular at many service stations then,and they wanted kids to be familiar with operating them..
99% of that type were ripped out after they leaked into the ground at gas stations--they just kept adding fluid instead of repairing leaky seals or hydraulic piping & fittings..