We covered this on the Flying Supervisors Course at Bentley Priory, along with Bud Holland and the Puma that run out of fuel and landed on a parade square in the middle of a parade somewhere in Europe.
Twas a long time ago and I'm sure there are better informed than me out there, but I seem to recall the root cause was thought to be a badly planned display, requiring said infringer to over cook a turn or something. The guy who briefed us seemed to think the pilot did a good job not parking it in CHOM.
more than happy to be flamed if wrong...just reporting what I recall for from a very good course, with a lot of "hidden insights" 15 years ago.