One more post, on one broken leg.

[Jenny]

On the original topic: after rereading a few books and other sources, I think I'm on the "he broke it jumping off the stage" boat rather than the horse falling on him. I doubt he lied in his journal and I'm not finding enough evidence to support the mare taking a fall. It's possible though. Personally I just see a lot more evidence pointing to John breaking it jumping off stage and probably not feeling it until a bit later due to adrenalin.