Only +6g? He can't have been trying! JF pulled a lot more than that one dark night in his Lightning - realising something wasn't quite right about his intercept, he pulled his head out of the B-scope to see nothing but black on the attitude indicator; the nadir star was dead centre and slowly rotating. Too fast for airbrakes, idle/idle and PULL....snoooooze....wake up climbing slowly through about 400 ft with the speed dropping through 200KIAS. Burners, recover, then home for new trousers!
But his 'little event' provided valuable fatigue data for the rest of Lightning fleet - and it seems that they had more life left in them than BWoS had previously thought.
Apparently he had lace marks from his turning-trousers imprinted on his legs for weeks afterwards.