Mystery Coat - Picture Of The Day - February 9th

So I walked into my lunch room today and this is what I saw.

I couldn't help but laugh but then I started thinking. Who's coat is this? Where did it come from?  I've never seen anybody wearing it in the office.  Is it a ghost coat? Is there a ghost slouched over right now in that coat? Maybe, just maybe.  Why would someone leave it like that? So many questions, so few answers. Well, the coat's gone now so for the moment it's a mystery.  The only thing I'm getting pretty sure of is zombies must be involved....somehow....