Take a basic task. i.e Making ramen. Describe how to do this in a even more hardcore/difficult/asinine way to do it. Then at the bottom of the post, you give the next person a task for example.
POST 1 Blah blah blah
Make Cereal
Post 2
I go to the store, and punch every single box of cereal in the cereal isle, making sure that there are holes in every box, I pour all the cereal out of the boxes, I then proccedd to pour every type of milk in that one area, thus flooding the store with milk. I then tear out my femur, fashion a spoon out of it, and eat my cereal.
Instead of a board, you cut a lawn out in the color/shape of a chess board X100. Now, adopt the amount of children you will need to play. Train each child according to piece (Pawn, Rook, etc) Have them fight to the death. Also, for a added challenge, play against Viswanathan Anand. Loser has to consume an entire chess set. Made out of cyanide. With a fork fashioned out a piece of their skull.