No subtlety here, it's going to be obvious where I'm going with this. Please consider the following scenario.
You're seated on a railway platform bench waiting for your train. A high speed intercity is about to hurtle through without stopping when you see a small child running to the platforms edge! Thankfully, disaster can be averted. You don't even have to get up off the bench, just put out your arm and scoop up the child.
But you don't. You watch as the little boy falls onto the tracks and is pulverised by 185 tonnes of metal.
My question. What responsibility do you bear for the child's death?