@sidereal This thread went nuts with railroad stuff, but the larger idea has not been discussed.

When faced with a seeming "no right answer" situation, go outside the parameters of the situation. Break some rules. If you can't derail the train, jump on and try to use the handbrake if it's moving slow enough. Try to untie someone.

If you fail, at least you attempted to do the right thing. Better than doing nothing because there is no right answer.