Lightning/Ground Run
My recollection is that it was the Sengo... engine runs on piano keys.. no canopy or seat, sitting on crate or somesuch with headset. Engines stuck in full AB... inadvertently airborne. Sengo had some 14 hrs total flying time courtesy of (then mandatory for Eng Officers) Chipmunk experience course. Eventually sorted, successful landing. Individual had some kind of delayed reaction years after event (nervous breakdown, form which he recovered).