Very sad, both the loss of the pilot and a fine aeroplane. Looking at the first video which 'sablatnic' posted (thank you), there appear to have been several nice passes with wingovers to reposition for another run. The last manoeuvre seemed to me to start upwards as if for a wingover but was then flown to starboard, not port. I wonder if the pilot momentarily lost orientation, started the wingover in the wrong direction for that pass, then looking in realised he would end up behind the presentation and crowd line. If so an attempt to recover the position by tightening the wingover and reef it around just a wee bit too tight might cause wingrock and the loss of control seen.
Horrible to see - and so easy to visualise happening, even in the much simpler machines I fly, but then I have no idea how a Hurricane reacts to overpulling at lowish speed.