Crash triggered by a small wave - but caused by lack of awareness and proper reaction.

Traveling in approx. 13 m/s cross offshore wind on a Tabou Rocket 95 with a NP Search 5.4.
Our victim is broad reaching (notice his stretched front leg/bent rear leg/open sail) and is about to overtake a couple of choppy waves. Apparently this small wave is pretty steep, and the nose of the board rises a little.
The nose keeps lifting, and it's about time for our man to start anticipating what might happen. Hopefully the sailor is aware that it now would be wise to ease the pressure on the fin and pull/lift his back foot and pull down the rig. Preferably he's also considering keeping the pressure on the mast foot and turn the board away from the wind. At this stage it can still turn out to be a nice little chop hop.
However, something's horribly wrong: Our man obviously has lost the pressure on the mast foot, and his rather stiff legs also indicate that he's not compensating for the lack of fin grip by pulling/lifting the foot straps to windward. The point of no return: The fin has lost grip, and instead of pulling/lifting the foot straps our man presses the windward rail down, so that the board is about to capsize in the air.
Yes, he has definitely lost control, and he's now so far above the windward rail that his feet are about to say good bye to the foot straps (and the board). The board's capsizing even more, the feet have lost connection with the board, and and the poor fellow struggles to unhook the harness lines.
He successfully unhooks (shall we credit him this minor success?). In his humiliating fall down to the water this front leg hits the surface first and is about to turn him around. The crash is complete. The board takes its own course and planes away in leeward direction, while our man still planes forward - but now on his back head first.