The turbopump on the Space Shuttle main engine is so powerful it could drain an average family-sized swimming pool in 25 seconds. The space craft turbo pumps I worked on in the '60's moved between 25,000 and 50,000 gpm. Dividing that by 60 and multiplying by 25 gives you 10,000 to 20,000 gallons. Ed Esther Williams did not win any Olympic medals for swimming or for diving. Right now as you sit reading this, more than 100,000,000 microcreatures are swimming , feeding, reproducing, and depositing waste inside that area behind your lips.
Kangaroos are excellent swimmers .
Bill Gates decided to hold a contest for the lawyers. Whoever wins gets to handle all of Microsoft's business. The day of the event, the Gates' estate is swamped with lawyers, all eager for the nod from the richest man in the world. He leads them to an enormous swimming pool filled with piranha. Then he snaps his fingers.