I was the only person who signed up for your challenge. The challenge is to: tie a person's legs, tie his hands, tie his eyes with a black cloth, put him in a wooden coffin, close the eyelid of the coffin, nail the eyelid of the coffin, insert a pipe (which is 6 meters long) into the hole in the eyelid of the coffin and you will bury the coffin with it inside 5 meters underground.