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1.
To vertical plank, to hang from a ledge/bar or any other things able to be gripped with the hand. Using only your hands, hang in a complete vertical position, elevating, as if standing. The higher/more dangerous the plank, the more skilled the plank.

™©® Vertical Planking, created by Benjamin Poletti

Credited to Alidad Aynetchi
by DanteLillyTigger November 10, 2011