The collision of the Vintage Pair Meteor and Vampire at the 1986 Mildenhall Air Fete. Seeing two good chutes made everyone feel better and it wasn't until that evening that I found out that there were two aboard each aircraft.
Photos: De Havilland DH-115 Vampire T11 Aircraft Pictures | Airliners.net
Photos: De Havilland DH-115 Vampire T11 Aircraft Pictures | Airliners.net
Ramstein in 1988 was far worse.
Photos: Aermacchi MB-339PAN Aircraft Pictures | Airliners.net
Photos: Aermacchi MB-339PAN Aircraft Pictures | Airliners.net
The Mig-29 collision at Fairford was miraculous in the low number of injuries. (And I was quite impressed by the Patrioulle Suisse taking off for their performance 20 minutes after watching Fulcrums rain down around them!) No pictures of that because I was videoing.