A game made for kids with downs so that they to can feel normal like the rest of us and claim fame on the internet. It's the act of stupidly putting yourself in dangerous situations and laying down like a plank with your body straight and ur hands on ur side head facing down.
Jon: Hey Mike wanna hang out and shoot some pool this Saturday?"
Mike: Na man I can't I need to take care of my brother who has downs and he cant do normal stuff like the rest of us.
Jon: Oh thats ok you can take him along lets go planking instead.