I have 2 Condor wheel chocks. My Street Glide and Ultra would both occasionally kinda stick. Since they are positioned against a concrete knee wall, my method was to just bump forward and usually that would unstick wheel. This weekend I parked my SERG in a chock, when I went to pull it out, it was not not going to happen...it was locked up tight!! I pulled the bike back 3-4 feet and drug the chock with it. Put the bike in gear and carefully back to the wall for a little rock...still stuck. I did this three times without success. Finally the rescue team arrived, my wife and daughter. They both stood, one on each side of the chock to help push as I pulled, that finally did the trick. Last summer also my Glide had been parked in the Condor for 3-4 days, I go out in the garage Sunday morning (Fathers Day to be exact) and the Glide is laying on it's side. My son helped me get the bike back up and announced Happy Fathers Day dad!! While watching my disgusted face he replied, it could of fell the other way and took down both bikes. Anyone have a spare manual??