According to Wikipedia, ‘Planking is the act of lying face down with arms to the sides of the body, in unusual public spaces and photographing it. The term “planking” was coined in Australia and became a fad in 2011.’
Blogger Tony Robertson claims that “planking” has its origin in Christian (and specifically Catholic) liturgy.
Bet you didn’t know that zombies are Christian too:
And then there’s Christian nudism: