Not too shabby, either! Seaside frivolity is a natural... who doesn't dote on a briny, breezy outing! And the ticklers really hit me where I live! Snails (sea-sails?) have been longtime favorite potential torturers... the idea of all that deliberate, slimy, soft-bodied contact is irresistible! The crabs, now... seems to me they'd prove a little pinchy! However... the aching trade-off (the tingly pleasant alternating with the prickly painful) would definitely add zest to the crisis! Ideal recreation for masochists, without a doubt! The sufferer's molar-clenching extremis seems a variation on the reactions you've employed heretofore; it drives the impact home, that's for certain! The surf is very well captured, what with turbulence, the foam and the impression of residual wetness. A pity the sand's so featureless... subsequent beach jaunts might include sand dollars, shells, seaweed, perhaps even a sand castle (built to straddle the victim, perhaps... with his feet protruding across the drawbridge?) At any rate, tickle fanciers can only envy this guy's helpless hilarity! Let's hope the tides ebbing, not incoming... could be the last morsel of fun he has!