Reminds me of a BoB Open day at RAF Waterbeach in 1951, to which I cycled from Cambridge as a 10-year old because I loved aeroplanes; unfortunately the Meteor 4-ship aerobatic display team had a collision during a team roll, with fatal consequences. It was my first, but not last, lesson that aircraft will bite. Those 4 don't look like Meteors, though, so it's a long shot.