Just my 2 cents.
I've been kiting since '99 and teaching since 2000. Flown just about every kite on the market and have never seen a strut just rip away from the canopy without the kite having been slammed hard straight downwind. This happens with any kite as the force of impact has to go somewhere. Usually the canopy. I'm not saying it is impossible but would be the first I ever heard of this. It could have been caused earlier causing a small tear that he didn't realise and then ripped while flying.

