This is an example not a demo, but I always liked this example
In the case of a movie ticket that has already been purchased, the ticket-buyer can choose between the following two end results if he realizes that he doesn’t like the movie:
Having paid the price of the ticket and having suffered watching a movie that he does not want to see, or;
Having paid the price of the ticket and having used the time to do something more fun.
Poker might give a good demo where you slowly learn that your opponent likely has a better hand.
This is an example not a demo, but I always liked this example
Poker might give a good demo where you slowly learn that your opponent likely has a better hand.
Simpler to do one round of bidding for who drew the higher ranked card off of a deck.