Hers is our group at the access point to the St. Marks Trail, The Tall Pines Shortcut and me doing a derailleur adjustment. I haven't performed a field conversion in a while. Fortunately it went well. His derailleur was pushed into the spokes by a hitting an object on the trail or a poor adjustment on the limiting screw. This is one of the worst trail ride breakdowns, it is sudden ugly and hopeless looking but the best trail side repair, quick, simple and exhilarating when you can start riding you single speed, no rear brake bicycle home.