You are on vacation in Africa and are walking through the jungle when you stumble across an African warlord. The warlord has 10 people tied to trees and is about to execute them. The warlord gives you an option of simply walking away and he executes all 10 people, or if you shoot one of the people he will let the other 9 go. Do you pull the trigger? Regardless of what you choose, you do not get killed.
Also, can't shoot the warlord because he has some of his bodyguards with him so if you do shoot him you (and the 10 people) also wind up getting shot.
This question was posed to my class last semester and I wonder what people here have to say.