Thats awesome! What happened is your shutter got stuck open so it takes the picture with the chicken and then continues to let the light in, bleaching out the part of the picture that moved, EX: the chicken! We used to do ghost pictures for halloween doing that! Oh and the reason why the background is moved is because you moved the camera just that much, so next time use a tri-pod or stay REALLY still and you can get some VERY cool pictures! If you want to do it with people you just take the pic and them tell them to walk away, the longer you leave the shutter open the more bleached out it gets. FUN to play with!