By 2000 his ankles and feet looked like water balloons, his liver unable to flush out toxins.

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Safe enough to go into the human body, the hydrogel prevents biofilms from growing and, thanks to its positive charge, attracts negatively charged microorganisms, which it then pops like water balloons.

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But you can use the water to to hit balloons and the occasional paddlewheel to lower a bridge or rotate a crane.

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He believes the little girl was attracted by balloons floating on the water, and fell in as she tried to grab them.

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