Apparently there are some buildings within airports that are “hard”, you can catch a wing on it.
This is true even if the taxiway ribbon goes into it or very close to it. I wonder if this also might be true of vehicles or other aircraft. How do we know which objects may be of this nature? I know, just don’t follow the taxiway ribbon and be careful!! 
I learned this the hard way when ground crew backed my 747 into a building on my very first attempt at pushback for this aircraft. Crash detected, black screen. Now I know.