Illusion of interdependence. I have really only one choice: Pull or don't pull. Pulling has two potential consequences, I don't control which will manifest. Not pulling has two potential consequences, I cannot control which will manifest.
Pulling: Loved ones live / three strangers die OR "almost everyone killed".
Not pulling: One loved one dies OR One loved one dies.
There's a hidden variable here too: I don't love strangers? But set that aside for now.