Circa 1980 heading east from Talyllyn (up the pass) when I spied a Phantom F4 come through the "gap" at the top of the pass. I was sat on my Honda VF 750 at traffic lights half way up the pass.
Why, I do not know, but I flashed my headlights at it.
As it passed below the level of the road (measured 50' AGL) I looked straight at it and as it passed the Nav gave me the "V"'s with a white gloved hand.
Magic!!