In a Line Gag the performers make short quips, gags, or puns in rapid succession.
The first player will turn to the next player in the circle and strike a physical pose and make a sound based on that character. Typically, the player will avoid saying legible words. They may sigh, or cough or mumble something. The first player is creating an instantaneous character using the holy trinity of the character (Move, Sound, Want). The second player responds with a character in kind and simply states their relationship.
This is a very structured story that is more like spoken word than it is sung. The warm up challenges the players listening and remembering skills. It can also be used to encourage a bit of mime. Since there is no way to convey rhythm or meter easily we will just show the structure.