It is impossible to body surf without getting seaweed tangled up in it.

And when the Priest reached the shore he saw the young Fisherman lying drowned in the surf, and clasped in his arms was the body of the little Mermaid.

By physiological analyze, freehand exercise for anti-sea-sickness is surely proved it can irritate and train otolithic organ system, so the body can adapt the stimulate to the surf gradually.