Make a story, each post can only have 3 words.
Example:
Poster 1: There was thunder.
Poster 2: There was thunder. A person screamed!
Poster 3: There was thunder. A person screamed! "AAAHHH! HELP ME!"
etc etc
Do NOT go back in the story! You must keep adding on, and not go back in the story (e.g. There was thunder. A person screamed! Then Poster two goes back and says" There was thunder. A person died!)
I'll start:
The sun rose
The sun rose. Revealing a pickle.