Gymnasts, being the daring group that they are, have taken the concept of a see-saw to the extreme with the teeterboard. Simply put, rather than sitting on the plank, gymnasts stand and jump on this apparatus.

A new, viral video depicts two men performing some pretty neat stunts on a teeterboard. Not only are they flipping in the air, they switch sides periodically throughout their performance. There are several close calls, but these guys make it look easy.

The video has been watched nearly half a million times in a little more than one day.

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The clip appears to be uploaded by a man named David Rimmer. He writes that he has competed internationally as a gymnast and currently performs in Cirque Du Soleil.

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