It has been suggested in some corners that the pilot may have blacked out during the high energy manoeuvre. Whilst this is pure speculation it does raise the question should display pilots have an upper age limit? Is it right a 51 yr old was performing a high g manoeuvre? Do display pilots undergo strict annual medicals, ECG, blood tests etc? Flying military spec, even fifty year old jets is demanding and perhaps not for the more mature pilot? You don't see many fifty year old pilots in active FJ service very often, you dont see F1 drivers of that age.