I actually feel sorry for the bloke. Pretty sure we've all done ridiculous things when we've had a few beers and haven't ened up tetraplegic. That said, in an age where organisations are terrified of being sued for mere trivialities it's interesting that a judge has found against the appellant.
I didn't do the same but did dive into the shallow end in Portugal, sore neck the whole week. No markings on the pool.