Here is the same choice but in a more "real" situation for those who need it. I thought of this already to help my choice, figured I mine as well put it down if it helps anyone else.
You're filthy rich and have a sniper watching your back when you go out at night but he won't shoot unless you say so (or you're about to die) through the microphone hidden on your person. You get mugged by two guys, they have minor weapons, you know they can't kill you before your sniper takes them out. Do you give them your valuables and take a few punches to the face/body or give the word and have the sniper kill them before they can lay a hand on you?
(PS if the sniper took time to fire a warning shot he would only have time to refire and kill one of them before the other smashes your head in with a rock, as well as the fact the sniper has strong principles against giving warning shots)
Can anyone find any holes in that?