I did a skydiving display into an emergency services event.
The event was held in a park with lots of tall trees all over it.
One of the most popular attractions (apart from the heroic skydivers) was an RAF Chinook static display. The crew were doing a fine job all day showing people round.
Unfortunately the aircraft had to leave before the end of the event. The crowds were ushered back and marshalls did their best to keep people back.
Due to the trees surrounding the aircraft I realised it would have to be a max perf TO and I was trying desperately to get the marshalls to push the crowd back at least twice the distance they were standing.
I got the impression that the thoughts of the marshalls were 'What does this bloke know. He jumps out of airplanes. He is obviously mentally subnormal. I shall ignore him and hope he goes away.'
With engines burning and rotors turning I saw the pilot and cojo trying to wave the marshalls back away from the aircraft but, like me, they were being steadfastly ignored.
It was quite surreal standing back away from the aircraft to see everyone (yes everyone) knocked over as the Chinook leapt into the air. I saw two baby buggies (thankfully empty) blown about 200 yards away and damaged beyond repair.
The impulse to subsequently find those marshalls and give them the 'told you so' look was just too strong to resist.