I visited a local Axiom board member to help him install and calibrate his new Axiom system. When I was wall-mounting his second QS8, the same thing happened to me. I placed it on the bracket, tested it for secureness (not well enough!), and let go. It stayed for a split second and then started to fall. I was still right under it so I was able to catch it before anything got damaged. The guy was a great sport about it, but I'm sure it would have been a different story had I dropped it.