Back around 1980/81, several school friends and I talked our way into the BAe Families Day at Dunsfold and having enjoyed the excellent airshow were poised by the barrier between the crowd line and runway end so we could belt over to the hangars for a quick look round the Harrier/Hawk production lines, then cycle back to school for dinner.
The late Stefan Karwowski closed the show in an earlier example of Dunsfold's hardware, Spencer Flack's immaculate red Hunter. For one of his last passes he arrived from behind the right shoulder of the crowd in near knife edge at high speed and very low - and just clipped the corner of the corner of the crowd line right where we were standing. I learned about wake turbulence from that!