As I know three pilots missing ring fingers due to catching their ring so to speak jumping out of doors.
Leaving the finger on the door frame along with various lengths of bits attached from the internals of their forearm (its seems the tendons attaching to the elbow region give out before those attached to the finger.)
As all of them post date the Canberra I can only presume the lesson hasn't been take to heart. BTW one of them was wearing 1980's issued RAF gloves at the time.