The rules of the game are simple. You say 'What if *Fill-in-the-Blank*' and another person, the one below you, of course, says "If *Above Blank*, then *Fill-in-Another-Blank*'. After you contradict their what if, you do your own.
Here's an example.
What if people could fly?
Here's an example.
TheGuy said:What if aliens were real?
I'll begin with:AnotherGuy said:If aliens were real, then Earth would be ruled by them and void of humans.
What if people could fly?