This what not what I expected - I spent a summer as a student working in a space with a manual cargo lift with no buttons, instead there was a hole in the wall

This what not what I expected - I spent a summer as a student working in a space with a manual cargo lift with no buttons, instead there was a hole in the wall with a chain. To go up you pull down on the chain, when you reached your floor you grab the (stationary, but the lift is moving) chain, which pulls it up and it stops, pull it up a bit further and it goes down - you have to guess the stop height to pull the chaiun at just the right spot