What I like about the Pyle document, is that not only is RP very experienced, and very knowledgeable, but he is quite happy to point the finger at himself.
He clearly explains the mistakes he made, where he went wrong, and how much of an idiot he was in that particular instance. If more people left their ego behind, and admitted their mistakes, we would all learn more.
Anyone who hasn't made a mistake, or done something stupid, who dives regularly, is lying!
I am afraid I have made a few, both on OC and CC.