wow man thats some deep thinking to do, there are so many things that you would have to consider or think about. How is your life going for you, do you feel you impact the world or the lives around you everyday. or are you a bum totally void from the existing world. then you gotta think about who could be in the other room, maybe your son or daughter, wife. but as stated you dont know who it is. So, i personally value my life and i do feel i impact people around me so i would press the other button, unless it was a group of maybe 15 or more people. Who knows maybe one of these people have the cure for aids, but i would want those people to know who spared their lives, but if i lived i dont think i'd want to know. so there you go.
That was a great question man, definately deep.