I did this myself. I was doin incline press with 145lbs. When I went to put it back on the pins it must have slipped off or I did not put it all the back on the pins. Well to make a long story short it slipped of the pins and came straight down and landed on my head. RIGHT ACROSS MY FOREHEAD!!!! I was out cold on the bench for a couple of minutes before someone found me. I was okay but I had one hell of a rasberry on my head for about a week and one hell of a head ache. It ws the last time I ever worked out alone. I have always been told I am hard headed but this was ridculous. Quess I was lucky.
i have seen the 5 pic... i dont think the spotters could've completely stopped the weight, they may have been able to lessen the blow but it would still hurt...