I done another stuip thing,I had my 55 olds convertible on ramps taking out the treadlevac power brake unit in my grandmas garage with no one home. Of course the emergency brake cables were froze up and I had forgotten to block the wheels,so I was removing the brake booster(50s olds were below the steering column) and I needed more room to wiggle it out so I moved the rod to the trans. The car came rolling down and if it wasnt for the garage door being down to stop the car I might have been killed, so here I am with the frame hitting my chest and being on a creeper wondering what do I do now so I was able to wiggle off of the creeper and get out. When I get out I noticed the creeper was busted and was thinking man that was dumb so I fired it back up and drove it back up on the ramps and blocked the wheels and removed the booster,the next day I was hurting so I went to the doctor and he said it was bruised ribs and I never done that again. Jeff