Do you not understand thought experiments contrex?
Of course I do. I just felt like having a go at a dumb thread. Also I know something about railways. If it was presented as "You are faced with a situation where, to save five people from certain death, you have to kill one, would you do it?" then perhaps I could take it seriously and answer "Probably, but maybe not." However such situations rarely arise in real life. If instead of trains, road vehicles were involved, e.g. "Would you crash your car into a tree and die to save a school bus full of cute toddlers?" or something like that, it would be equally silly. We could all choose the noble answer, safe in the knowledge that it is just a mental exercise.