Apparently the problem of legs getting jammed while exiting the
Spitfire was a common one. Bader was lucky in that he could just pull
the rip-cord, and leave the legs behind.

Actually, it was even better luck for Bader: he had been told that if
he landed a parachute jump with his no-knee-joint prosthetic attached,
the shock would drive the thing right thru his pelvis (More,
short-term, g-loading!)