I had my chain drop (fell to the left of the chainring to the bb) and un-rotofixed the cog, blowing the lockring threads right off. Going about 20 mph, locked up the wheel, hosed 9 spokes and scared the hell out of me. Just took the wheel off, put the cog on the other side, hammered down on the pedals a couple times and peened the lockring on with a adjustable and 10mm wrench. Still have yet to fix the spokes, they are still intact, but have heavy damage... DT spokes are damn strong!