Just a small guy driving a Hobie FX One myself -- but this ENTZ crash looks really quite similar to what happens regularly to me: a death turn on my Hobie. When accelerating from beam reach to downwind, setting up for the gybe -- there's very little margin for error and the smallest (i) wave, (ii) gust, or (iii) unbalancing of the Hobie will cause an epic wipe out (if at any decent speed). The best solution is to take the turn very easy -- quite the opposite of what Dean Barker is doing here, he basically bangs the corner. On a Hobie FX One that's a sure way to wipe out.
Sure these are 100x times more advanced machines but the physics are the same: too much speed (from beach reach to downwinde) in combination with the too tight turn increases the pitch of the bows, and your fucked.