Stealth Pilot wrote:
canopies that hinge backwards will just be blown away but may take the
pilots head off as they depart the aircraft.

Wouldn't the hinge also have to fail for the canopy to strike the occupants
of the cockpit? Otherwise I'm not sure how the geometry of the situation
would cause any part of the canopy to enter the cockpit to strike anyone in
it.

(I could see how such a canopy's hinge would fail eventually and causing
rudder damage.)