(CNN) What do you do when you're done building the world's largest Nerf Gun? If you're Mark Rober, you set your sights on the mother of all water guns.

Rober is a former NASA engineer who clearly likes to think big.

Not content to rest on his laurels when Guinness World Records recognized him as the creator of the biggest Nerf Gun on earth, he set his sights on a Super Soaker.

And this thing is a beast.

It shoots water at 272 mph. That's eight times more powerful than a fire truck hose. It can break through glass, destroy large watermelons and slice through soda cans.

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