Whenever I go upstairs in those two buildings, fire station and control tower, I mostly end up with broken legs and dead. It's always random, I would just be walking around and at some point it happens. Sometimes I'm able to survive with just the "pain in my legs" message and ruined pants and shoes. Most of the time it's broken legs or instant death.
It happened to me on several occasions on the latest build of Experimental. I can't speak for the Stable version of the game.