I hit a parked car 4th gear pretty well tapped 16/40 gearing with my old j-arm frame, bent the bumper and sheared the bumper bolts. Moved the car 18", it was an early 90's Taurus that had been parked for a good month with maybe 3" of ice and snow on the ground. I got an ambulance ride and an emergency room bill but my frame was fine. I still have my mangled DG bumper in a box somewhere.