This is a classic game. Pretty easy game, too.
Ex.
[User 1] ( Can't post, because there is nobody above him)
[User 2] User 1, I see you playing ping-pong
[User 3] User 2, I see you eating a dog
Pretty easy game. Just say the user's name THAT POSTED ABOVE YOU, and say that you see them doing something.
So, somebody do me...