Not my story, but as told to me ; Lighting pilot flying over West Germany in the 70’s (can’t remember whether doing a CAP or just a random Nav-Ex) when ATC call him up and ask if he’s interested in some trade. My mate says of course and is given a steer for an unidentified low level fast mover down by the E. Germán border somewhere. “Brilliant‘ says matey and catches up with the traffic. Turns out to be a lost GAF Starfighter shooting along at a high rate of knots in the wrong direction. How does my mate know he was lost? Easy.....the Starfighter pilot has his map unfolded and is turning and folding it trying to orientate himself. Matey decides to sit on his wing and wait and see how long it takes the Starfighter pilot to notice him. Seconds pass before the pilot glances to the side and glimpses the Lightning sat on his wing ....cue a seriously hard G pull-up by the poor guy as he reacts instinctively and pulls to the heavens!.