Same rules apply in the original story tem, but except you'll be able to put 3 words instead of two (If you have to put 4, sure, but don't do it all the time). If you've never played before, simply continue the story based on what the last few people said, for example, if someone said "A horse kicked" and another said "the farmer's arm", you would continue the story using 3 words, and it would go on and on, until the post is a dead post. Fun right?
A mouse wanted