He could keep his feet no longer, knees caved in on the spot –
as under the ruffling North Wind a fish goes arching up
and flops back down on a beach-break strewn with seaweed
and a dark wave blacks him out. So he left his feet
and down he went – out cold.

– Homer

The Iliad, Book 23, lines 769-773. Euryalus is knocked out cold by Epeus in the boxing match. He is like a fish leaping up in a forceful North Wind that flops back down and is blacked out by a dark wave, we are told in one of Homer’s delightful epic similes.