The Bean Bag Storytelling Game

From the introduction: Gather a few friends and two bean bags. Each bean bag should have a different color; we'll assume one is green and the other yellow. Agree on the Premise. The players agree on a basic story premise: a child must be rescued from a witch; the town must be evacuated before the storm arrives; an artifact must be recovered from alien ruins; etc. User summary: This narrative mechanic is genre neutral and very simple.