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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I just killed the Gymnast Jax Kranitz #FlexChallenge 🔥🔥🔥 pic.twitter.com/tUv2l7mN6I
— Tipsy Bartender (@TipsyBartender) January 9, 2020