Apparently, planking is old news. The way that the future of our country keep themselves amused these days is by 'horsemanning'.
The principle is simple; one person lays down with their head out of sight, another hides behind something so that just their head is showing and pulls a suitable face. A third captures the scene for posterity.
I suppose at least this is a little more sociable, involving three people in comparison to the two required for planking, but honestly, who would waste their time with such inane nonsense?