Thing,
As I recall the SR-71 was not an exit by an Ejection Seat but was an ejection of the Seats and Occupants following the aircraft going unstable following an engine failure and breaking up.
At least one event like that occurred although there were other "normal" Ejections where the Crew survived.
The WSO suffered a broken Neck during the break-up.
The Pilot was picked up by a Rancher flying a Bell 47 which he reckoned was the scariest part of the Day.