While in Chongqing we went to a carnival by the river side. There was one event that got our attention immediately. It looked like people running around inside giant hamster balls on top of water. What fun!
A thought immediately came to my mind, though: how do they get fresh air in those things? It turns out they don’t. They fill the balls with a big blower, then zipper them shut and put a big piece of tape over …


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