Paranormal Activity?

I'm hesitantly writing this post.  Let me give you the back story first.  When we first looked at the house it was at the estate sale.  An elderly woman had died and her son and daughter were running the estate sale.  When we went inside I told the lady that I thought the house was beautiful.  She said, "thanks, the house is haunted".  Um, ok.  We just thought she was nuts.  Later though when we were negotiating for the house I asked her what she meant by "haunted".  She said that she had been up in the third floor room where there is a pool table and the door had opened and closed.  Ok, rationally, this could be either from a draft or an improperly hung door.  We decided that this wasn't a case of a haunting...which we don't believe in anyway.  That's important to understand.  We are very scientific, rational people who don't believe in much.  

So let's cut to this weekend.  Here's how the conversation went.

Husband:  I have something to tell you, but if you don't want to hear it just stop me"

Me:  What?

Husband:  I saw something in the house today and I took a picture of it.

Me:  Does it show up in the picture?  (I've seen too many vampire films)

Husband:  Yes.

Me:  Ok, well is it something you can rationalize?

Husband: I've tried and I really can't.

 My husband was moving boxes from the second floor up to the third floor to make room since we are starting to work on the second floor.  On Saturday he moved a few boxes to the attic and the third floor bedroom with the pool table.  On Sunday morning he went back to get another box to move up to the third floor room.  When he went to the room, this is what he saw.

I'm glad he took pictures because this would be a little hard to believe.  He said that he thought that if he moved around it surely the floor boards would move and it would fall.  But it didn't.  He moved the broom and went on with his work.  

Now, someone just told us that the planets were lined up recently and something about  the gravitational pull is allowing brooms to stand up.  The thing is though that my husband is not really sure that the broom was even in the room on Saturday.  And, even if it was, he didn't prop it up.  People who have done this "experiment" have been putting the broom upright and letting go.  This broom was not propped up.  Is it possible that this is a gravitational thing because of the planets?  Hey, I'm not ruling it out.  In fact I prefer this explanation.  We're still a bit freaked out, but we have to continue on.  If something else happens though we're going to have to rethink a few things.

What do you think?