Thousands of people in China are making "finger knots" to show off the flexibility of their fingers.
The "finger knot" requires someone to interlock their digits to form a knot.
Weibo, China's equivalent to Twitter, users have been quick to share pictures of them doing the difficult hand trick.
The new social media craze has spread quickly and caught the attention of the Daily Mail and BuzzFeed.
The BuzzFeed even made a video to teach viewers how to do it.