It is called "planking," and it is apparently the latest craze on Facebook. And now it is a fatal craze.
Planking is when someone lies face down with their arms at their sides in a strange place -- the stranger the better -- and then a photo of it is posted on Facebook.
It is especially big in Australia, where over the weekend it left a young man dead. Police in Brisbane say 20-year-old Acton Beale decided it would be a good idea to lie across the railing of a balcony seven floors high. He lost his balance and plunged to the ground below. He was killed instantly.
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"It is what we've been fearing," said Queensland Deputy Police Commissioner Ross Barnett, according to the New York Daily News.
Police have been warning people not to take the practice too far, that it could be dangerous. They were proven correct.
There are several Facebook planking pages that show people lying all over the place -- on top of signs (above), in the middle of streets, and yes, on balcony railings.
Most of these are just harmless poses. Some of them are not.
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"Accepting a risk of injury for yourself is one thing, but the potential is there for others to be injured as a result of your behavior," Barnett said.
Undeterred, planking groups have deemed May 25 "Annual Planking Day."