Yea, looking back, I do believe the chain breaking was caused by a cross shift, or mis shift. I think I shifted front, and it didn't go through all the way, and then I shifted back...
All the while I was clanking like crazy on me. Now I know the signs...
When this new XT arrives, I'll install it, and test it while bike upside down. Then I go out there and learn to shift properly...
Do you think I could reuse the chian? It had 1 bent element, where it brocke. I fix that with some pliyers. It is straight now, and able to hook.