How do you get inside the hidden chamber(s), behind the escalators, on fy_buzzkill I'm playing version 1.6.
Edit: I noticed a couple of players were able to crawl inside the escalator, camp and shoot anyone who lurked in that area from inside.
Normally, the escalator throws you in the air when you step, walk or run on it. However, a player asked me to crouch+move onto the escalator; when I did I went straight through the escalator. There isn't any ammo or easter egg there but it is a very, very good place to camp.
Now, next day I tried to repeat the trick over and over again (multiplayer and local) but failed. I need "steps to reproduce the behavior".
Here is screenshot in overview mode:
Move around here and there so that some of the wall and other textures disappear which reveals the space for camping: