I blew it out trying to move a heavy piece of medical equipment. It was about 1000 pounds and had been sitting in place for about 8 years. The hospital had been buffing and waxing the floors and there was wax build up around the feet of the module. My initial attempt to move it failed so I turned my hat around really put everything into it that I had to try and break that seal and move it so I could disconnect all the cables and power and prepare the equipment for taking out of the hospital. Well needless to say, I got it to move right about the time my back said "fuck you dick, I am done". That was Oct 26th 2016....been in pain since then!