From the far side, one "classic" show I remember from years past from The Twilight Zone:
A stranger shows up at the door and delivers a box to couple. It is a simple box with a button on top. The stranger tells the couple that if they push the button, he will return and give them a large sum of money. BUT "someone YOU DO NOT KNOW will die."
Much of the show is consumed with the couple's agony over whether or not they should push the button -- the rights and wrongs, goods and bads, pluses and minuses. They check the box carefully and find it to be completely empty, with nothing except a button on top. Should the push it? Should they not? Why not?
Finally, they push the button. The next day the stranger returns. He takes back the box and gives them the money. They ask, "What are you going to do with the box?" The stranger calmly replies that it will be given to someone else -- "someone YOU DO NOT KNOW."
At least that's how I remember it.