Found this screenshots. Made them about a month ago. We're playing bunker and I was comming. Trying new base lay-out and stuff. Placed an Arsenal, then destroyed it. When I sent my workers to a certain place and they had to pass the place where the Arsenal WAS, they couldn't pass... so I left comm and checked out myself, BOOM, an invisible wall.. I climbed it using the mountains and stuff and then realized I was on the old Arsenal... very strange shizzle, great for blocking demorunners 
Did something like this ever occured to anyone else?
