NASA uses 450,000 gallons of water to shield launch vehicles from acoustic damage

boing
22

this sort of thing?

https://www.amazon.com/Baby-Toy-Aquashots-Creative-Educational/dp/B078KGX78W/ref=sr_1_224?s=toys-and-games&ie=UTF8&qid=1514519996&sr=1-224&keywords=rocket+pump

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