In 1962 our Vampires were getting a bit twitter and bisted. Aircraft would have red line entries in the F700 like: 'Not to be spun solo' or 'No intentional spins.' Entry would vary even on the straight ones. Sometimes there would be a lazy roll and then pitch down; other times there would be two vicious flicks and you were in
Recovery was standard and it would recover between two to four or more turns depending on altitude.
On the walk round before flight one would shake one boom to ascertain whether the other boom shaked at the same rate.