First it was planking. Then came the Ice Bucket Challenge. Now a new – and bizarre – viral phenomenon is sweeping the internet.
Young people around the world are attempting to step on an “invisible box” for an online optical illusion.
The trick involves participants pretending to lay a box on the floor in front of them, and patting the imaginary “top” to help create the illusion of a solid object.
They then raise a foot in mid-air, pretending to step on the box before “hopping” their other leg over to land on the other side while keeping the original foot suspended.
The trick might sound simple, but this notion is disproved by the number of people filmed falling on the floor.
In recent weeks it has picked up momentum thanks to footage of successful attempts by US football player Dontez Hines and Texan cheerleader Ariel Olivar.