My number two is "The Rule of Fun: You can call a dive at any time, for any reason with no questions asked and no repercussions." He should have followed this rule too. In this case, hind sight is simply dead.
I don't think calling that dive was humanly possible.
Many years ago I heard a commotion in a school hallway, and I stepped out to see two 9th grade students squaring off for a fight. I cleared my throat to make my presence known, and the one student I knew said, "We're busted!" and prepared for the trip to the principal's office. Later on he came to me and said, "Thank you so much for breaking up that fight! He would have killed me!"
Ever see the movie The Outlaw Josie Wales? In one scene, a bounty hunter confronts Josie Wales (Clint Eastwood) inside a saloon, and Wales offers him the chance to walk out and live. The bounty hunter leaves, but a few seconds later he comes back, saying he had to do it. Wales nods understandingly before killing him the short ensuing gunfight. It is a perfect example of human nature--you can't back down from something like that. It is better to die than to face that humiliation.