Thank you guys! But it is really difficult. I don't know why actually. Because I can easily bring the paper when it stands to shake! I the shaking movement, sometimes it even leans a little bit toward me and when I lose focus it drops back to the old position. But something is not there, that makes the final pull! I mean it doesn't make much sense for a light weight paper to lean a little bit forward without falling, does it? Unless it actually tries to levitate and stands really on the edge so to speak. because I see it all the time, that the paper suddenly goes back in old position, like a human who nearly fell down but could handle to rebalance. It is the same with the papers!