For some reason someone decided it would be a good idea to mirror the windows in the building behind the one I work in. This leads to a disconcerting sight every time I look out of the window; I see the roof of the building I'm in reflected back at me, below the roof of the building I am looking at! If I glance down, I see the windows of the floor below me. Windows within windows!
It has been like this all week, and it catches me out every time I turn around from my desk. Thankfully the floor height of where I am based and of those adjacent are different. I will therefore never catch a reflection of myself staring back at me as if standing in a different building. That really would be freaky.