Well, I was trying to stack a control board onto a 12 V Battery, and I used CTRL to move it higher. It finally became place-able and I attached it. When I looked at it from the side, it was literally floating in mid air. I wanted to see if I could do it again, so I used a CO2 tank with nothing under it, and I raised it. Once again, it was in mid air.
I'm not sure if you guys knew about this already or if is even a glitch.