I'm not sure if you all already know how to play this but here goes.
One person say something good happens and the other something bad happens.
eg.
Person 1: Once upon a time there was a princess, unfortunately she was stuck in a tower.
Person 2: Fortunately, one day, a prince came to save her.
Person 3: Unfortunately the prince fell down a hole on the way there and died.
Person 2: Fortunately there were some stairs so the princes could just walk out anyway.
etc.
Ok, so I'll start.
One day Bob was on his way to the pool to have a swim, unfortunately it started raining.