A procedure first invented by Stacy Wilkinson in which anyone can participate. There are a few rules to "planking" however.
1. You must always lay face down, ensuring your face remains expressionless for the duration of the Plank.
2. Your legs must remain straight, and together with toes pointed.
3. Your arms must be placed by your side, held straight and fingers pointed.
4. You must make it known that you are Planking.
5. Your safety should always be considered. Properly thought through Planking procedures should always go to plan. Never put your self at undue risk.
6. Every Plank that is captured must be named.
Did you see Kaleb K. "planking" on Fb? Yeah, Stacy Wilkinson invented planking.