I bent a Hope disc rotar, snapped a chain, broke like 10 brake cables, recked 3 sets of snail cams, bent 2 sets of chain tugs, snapped a cheap monty hub axle, broke 2 freewheels, took a chunk out of my Echo Lite frame (side hopping) and then I had some Onza T-bird cranks on my Echo and the chain wore through the frame. Oh well it happens