mid-air crash at Duxford airshow

A P-51 Mustang (actually a Commonwealth CA-18), 'Big Beautiful Doll' and a French Douglas Skyraider collided in mid-air while banking away after a formation fly-past at low level. The Skyraider lost a large part of its starboard wing in the collision but landed safely. The pilot of the Mustang parachuted to safety leaving the aircraft to crash into a field. Both pilots were miraculously uninjured.

http://www.bbc.co.uk/news/uk-england-cambridgeshire-14101641

I just hope that people don't over-react and call for the end of warbird airshows. What they do need to look at is the level of training and practice pilots undertake prior to any proposed formation flying. Formation flying is inherently dangerous and requires its own unique set of pilot skills; it's not the sort of thing most civilian pilots are familiar with.