In an aquarium I've seen fish sleep. Suspended as though in space. Yet I've never seen fish yawn. I guess they funnel enough of tiny bubbles of oxygen that allows them to frolic among the corals. And under the giddy lights of the casino the gamblers too carried away at the tables too wrapped up in placing bets or plunging down the arms of bandits unaware oxygen slyly pumped into the hall kept them awake to swim as fishes in their glass world. Oblivious and never wiser. Gamblers never gets richer only poorer.