Farnborough, when I was quite young - end of the 50s/early 60s.
Solo Lightning takeoff - held level to 250kts or so, then up to 18000 ft in what seemed like no time.
Also the Black Arrows (Hawker Hunters), predecessors to the Red Arrows, I being most impressed by a solo "falling leaf" manoeuvre from altitude.
Then later they started getting F-14s and things in, which were just noisy
.
Terribly crowded things, air shows today.