Sway, Slide Projector Installation, 2009

In motion picture lingo, vertical movement in the projected image is called 'jitter', horizontal movement is called 'sway'. A slide projector shouldn't have any problems with horizontal movement unless you hang it from a cord, build a sail for it and fill it with the wind from its cooling fan. Is it the projector floating in the image or is the image in the projector afloat?