My dad once put the hitch part of the boat trailer through the fibreglas garage door, which was up. He had walked all the way to the back of the boat, and there was no weight on the hitch... My mother heard the crash, and the ensuing cursing, ran out to see what was up. Then she ran all the way to the other end of the house, so he couldn't hear her laughing. Stuff happens, best to laugh about it. Durn good thing you weren't seriously injured.