I know nothing whatever of these events.
I would comment that just about any winded aircraft can be spun, if you work at it. I wonder if the pilot was working at it, and if so, from on low? I've been to a lot of flying demonstrations, and there seems to often be a "watch this" element in some of the flying. I make no judgement here, but remain concerned about the image our industry, of unsuccessful attempts at unusual maneuvers close to the ground.
I'm unhappy for the pilot, and unhappy about accidents in general.