Offer up an "Would you rather X or Y?" scenario, however sincere or ridiculous as you please. You can also take the Trolley Problem approach if you want. Someone responds, explains their rational if they choose to, and then offers the next choice. And so on and so forth. I'll get the ball rolling...
Would you rather:
...be able to fly but have to shit your pants to start/stop?
OR
...be able to turn invisible but have to orgasm to start/stop?