Go on Moparts and check out the post in the race section. That was an expensive crank in an expensive Ritter block that was built for high rpm. Bunch of scrap metal now on a high dollar build.
I saw that. I don't know how many passes he has on that combo but I think he had quite a few.
BTW, I've seen cranks break like that before. I'm pretty sure I know what caused it. But the amount of HATE that would be tossed my way wouldn't be worth the time to post it.