One person asks a would you rather question. The next person answers it and asks another one for the next user to ask, and it continues.
Example:
User 1: Would you rather be able to eat as much as you want without gaining weight or sleep as much as you want and time stops?
User 2: Eat as much as I want. Would you rather be the most attractive person on the planet or the most intelligent?
User 3: Intelligent. (and it continues)