Dear Tricky, as the weather is pleasant today, Mr Cassidy is probably off flying in one of his special up side downy machines, so let me tell you a bit about the article, which is well worth a read. It appears to be be aimed at average GA pilots, and it has specific relevance for those who have stumped up the loot to civilianise the well flogged Dogs recently let out to play by HMG. I plan to go off aerobatting in a Dog this afternoon and hope not to have need of Mr C's technique, especially as the canine in question comes without parachutes.
PS: your name has been taken in vain here recently, see posts by one Flyer Boy, passim, and either defend your honour, or fess up.