Messed my back up pretty bad moving 5 pinball machines out of a guys basement.
I ALMOST had a playfield come crahing down on my head! I was working on a machine, with the playfield in the full upright postition. I was tighting down some screws in upper section of the playfield, but since the playfield was up, these screws would be in the lower section underneath the playfield. I was tightening them and I noticed that the screw was moving away from me as I was tightening it up. Luckily I realized what was happening(I was pushing hard enough that I pivoted the playfield to fall back....on me) I caught just in time, but man that was close!!
-Mark