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Freediving is a crazy sport where athletes hold their breath underwater for up to 7 minutes! David Helder is a master freediver who can not only hold his breath underwater for a long time but also blow huge vortex rings. It's amazing!
First he knocks over bricks with just his breath.
Then he blocks fives rings, each one inside the other.
Okay, Okay, Just check out the video.
Go to 2:40 to see what he can do!
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