In the apartment complexes with the broken staircases in Dubky, there are elevator shafts which have a ladder in them. I was under the impression that you could use the "vault over" key (v) to climb back out of the elevator shaft. The reality of the situation is that once you get in the elevator shaft, you are permanently stuck in them. There is no way out of it.
I would suggest adding a control to CLIMB LEDGES in order to avert this issue, and prevent players from getting stuck on scenery or architecture in the game, especially since there is no "jump" key whatsoever (which is kind of funny since its supposed to be a simulation and you cant jump). Just some friendly suggestions, but yes, the elevator shafts in Dubky get you stuck.