My husband had a flat tire the other day it was minus 10 wind chill with the snow blowing . Our spare tire is mounted on the back of the truck. As he went to take the bolts out of it to remove it one bolt snapped and the other bold spinning. He had no choice but to grab on the edge of the spare tires and kept on slamming it back and forth 'till the last bolt snapped. When the bolt snapped the tire went down and my husband went down on the ground. After fixing the truck the very next day when he went to get out of the bed he was almost screaming in pain because he had pinched the nerve in his lower back that goes down the entire length of his leg. The only was to fix this for now is to wait and see if it fixes itself.