A redditor called Zenmasterjobo uploaded a video of a sliding door his buddy recently had installed in his lovely home. At first things look pretty good, but there's one big problem that can't really be ignored. It might take you a second to get it.

What happened here? Was the door installed upside down? Did the homeowner order the wrong door and the people installing it didn't have the heart to tell him? Is this just a really cruel and expensive practical joke?