Delaney T
You have taken some stick from three people who seem to be either poorly informed about the subject of airshow accidents or misread your intial post.
There was nothing controversial in what you actually wrote (but you know that) neither did you say what you thought had happened to the L-39 – merely what the stats from the past would suggest. You made one minor error of fact - the Thunderbird was doing a pull through not a loop.
Some years ago I stopped keeping a tally of the number of aircraft I had actually watched fly into the ground at airshows when it reached 10. Of those only one had a technical failure that was possibly a contributory factor. I have talked to pilot friends (including myself) after their airshow near misses and established the reasons for the mistakes they made. But mistakes they did make and to their credit they never suggested otherwise.
Mind you while doing a tent peg may be tragic from some viewpoints I suspect it does not hurt. Unlike getting old.
(Drs tell me that pain signals travel round the body at about 40mph)
John F