I don't think he hit bottom. If he did, the alluminum spinnaker pole would have broken. At the very least, there would be mud on the pole end and there is not. I know this from personal experiance. Also look a the angle the mast is at after the boat flips forward. for there to only be a few feet of water, the mast would have to break to be at that angle. lastly, both skipper and crew are only thrown a few feet in front of the boat. If it had been a bow hit at full speed the skipper would have landed 15-30 feet in front of the boat. Matt Mayfield and I did this on a N 6.0 once in the steeplechase. I hit the mast and got my trap hook caught on the diamond wires (above the spreaders) and I watched matts 220 lbs of grace sail over my head. He cleared the mast tip. The pole did not break because it was carbon, but it made a hell of a twang and the block at the end got so much mud in it it never worked again. Every time we hit a wave afterward we got a shower of mud from the mast tip.
What you saw was just a regular old nasty pitchole.
Thank god for motrin.

Eric