What is Planking? The New Internet Craze. Buildings, Trees, Railings and More Crazy Pictures of Plankers

An Australian man fell to his death after planking on a railing of an apatment or hotel room balcony. What is planking? What is a planker? It is the newest hot internet craze/fad of posing in strange, sometime dangerous positions basically balancing on your stomach. Why is it popular in Australia?
How did he die planking? He fell. 101 dumb ways to die? Pictures of people planking can be found here. Man dies while planking = Dead planker. Do Americans Plank? What's next, BABY PLANKING?