Basically it's a story but you have to start with fortunately/unfortunately and it has to be the opposite of what the guy on top of you posted
e.g-
There was once this man who got on a plane
2-Unfortunately the plane's wings were not attatched on properly so in the middle of a flight, it fell.
3-Fortunately, there was a parachute
4-Unfortunately there was a shark there
etc.
I'll start first.
There was once a school boy who went to an aquarium/zoo together! (Like on one side is aquarium and other is a zoo...somehow)
CONTINUE!!!