Me (glancing through the glass doors): Either the racing is over or they're running underwater.
Ailz: Underwater racing would be good.
Me: You'd have to fit the horses with aqualungs
Ailz: And weights. (Thinks about it a while): You could have racetracks on cruise ships.
Me: That's a great idea. But you couldn't have them running in choppy weather. Every time the ship lurched the horses would fall over sideways.