Very sad for the loss of another aviator, condolences to the family and comrades.
To those who are no doubt curious on how the ejection system works, this may help. The Hawk has a variant of the Martin Baker Mk 10 ejection seat, which is a "zero Zero" rocket propelled seat capable of performing with aircraft stationary on the ground with the canopy down and locked. Take a look at the link below, it explains nearly all of the process of a normal ejection. I believe the system in the Hawk does have a command ejection option operable from either cockpit to allow one occupant to eject the other in case of injury or unconciousness.
An uncommanded ejection from a stationary aircraft, although unexpected, physically unpleasant and extremely scary, would normally be survivable assuming:
a. The occupant is strapped in properly to the seat and parachute and is hooked up to all correct systems.
b. The ejection sequence functioned correctly.
Heres the link:
http://www.martin-baker.com/products/Ej ... k--10.aspx