o me it seemed to pose a nose up then down just before he pulled hard back, could this be due to a stall during the decent?
Hairey
You have a very valid observation rather than all the pointless discussion on whether he was doing this or that in earlier parts of the manoeuvre.
its the point that he lost the aircraft which is relevant and I noticed that sharp and abrupt dip too.
his profile was smooth till that point so don't think it was a high speed stall or stall recovery pitching forward to lower the AOA.
I have a suspicion that something upset its smooth trajectory hurling the aircraft down with a frantic attempt to recover.
Maybe a failure of some kind
Pace