wow, you must have fallen off a 10 story building to do that. i have hit everything, landed every way and not broken any knuckles in truggy or buggy. i have a spare set unopened i thought i would need. that may have been a bad one but i do not think it is common to do that. that one is cnc, the cast ones are more silverish in color and those are junk. my problem today was clutch bearings, still looking for a cure.