Ghost or static phenominon?

[Porkchop]

So I'm sitting here at work in the back room, no customers. Earlier I was cutting some paper up into long strips so I could re-label some shoe boxes. Nothing bigger than half of a sticky note wide, but long. I was just replying to another thread when I saw something move out of the corner of my eye. I look over to the desk and one of the strips of paper was standing on end at a 45 degree angle, in a perfect straight line. I took a step closer and the thing started to move to about a 70 degree angle, still no slack just dead stiff. It stayed there for a long time and I was just turning on my camera when the thing just slammed back to the desk. When it fell it still didn't bow or wave, it just kinda slammed flat. I picked it up, and it instantly bowed in my hand. There are no windows, vents, or doors in our back room. So... some kind of freak static phenominon, or a ghost?