Yeah, I completely understand that. My first back injury was when I was 20 and leaned over the fender of my '70 duster trying to line the tranny and the engine up during a motor swap when the tranny fell off the blocks and yanked me over to the ground, ripping my lower back. About 5 years later, an big overhead garage door collapsed off the tracks while I was lifting it up at my shop and it landed on my head/neck wrecking my upper back.