I appreciate this take on the concept of how this utility function would work. If we made the utility function different within our utilitarian framing, we might produce different outcomes given the same scenario. It seems that the differences in our utility functions are whether they are based on absolute or relative suffering. Also, death may be a type of suffering which is different from pain, as I assume most people would accept a large amount of pain to continue living. How many times of getting hit by the train would be equal to one death, I wonder?