Like Ten Levels of Why, but going the other direction.
Start with the last reason given in Ten Levels of Why.
The player says her/his sentence out loud, then one person says, "so...?"
The player must give a consequence; "So..."
Then another person asks "So...?" and the player must give a consequence that flows from the previous statement... and so on, until ten so's have been asked and answered.
At the end, the person repeats the original sentence and the tenth consequence.