What Is the Viral Flex Challenge on Social Media?
The "Flex Challenge" Is Taking Over the Internet, and It Looks Damn Near Impossible
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#FlexChallenge 💪 lay on the floor with your hands behind your back and try standing up without going on your side 😂😂😂 pic.twitter.com/UJTmhEmmtS
— Elvis Duran Show (@ElvisDuranShow) January 10, 2020