The Center of Gravity Challenge is a viral social media trend that gained massive traction on platforms like TikTok and Instagram. The challenge involves participants kneeling on all fours, resting their elbows on the ground, placing their chin in their hands, and then quickly moving their hands behind their backs. Due to anatomical differences in the center of mass—which is typically lower in women and higher in men—women are often able to maintain their balance while men frequently fall face-first. This scientific quirk became a comedic goldmine, with the meme usually highlighting the smug success of one partner compared to the inevitable, gravity-induced failure of the other. It remains a popular way for couples to showcase the funny physical differences between genders.