This is a combination of Charades and Whisper Down the Lane (some people call it Telephone).
Three people leave the room. The rest of the group makes up a short story and picks one representative to act the story out. The first person enters the room and the actor acts out the story. The first person of course has no idea what the story was about, they can only imitate the actions that the actor/story teller did.
It is now this first person’s job to communicate the story/actions to the second person who has been outside. You can cut the game off now and have the second person guess or make it even harder and have them act out this watered down version to a third person. The third person must explain what they think the story is. This is very amusing for all. It is also interesting to see what the middle people had interpreted and tried to communicate.