ive broke em like that before, high speed hard moguls and jumping. usually does start in just one or two places cracking but if you go any farther is when it does that, have done it a few times, maybee he got lucky usually it lets radius arms dig in and ruin the track, learned my lesson on keep going, once it hapened when it was the second ride on a brand new track. ive also got more to add on my first post on the strength of the reinforced ones. last weekend i broke the front arm between the rails that the bottom of your shock, and limiter straps hook too - sheered off the ears on both sides and kept going a few miles cause i was almost home, i had spots in the gussets on the reinforced w arm where the rails hit it when it bottomed out and there is still no cracks in it, that amazes me compared to the junk weak stock ones.