Idk, for me one man vs one octopus is sort of not my business. But, in a pressure-less situation with a man vs thousands of octopuses, my trolley would probably go over a man, especially if the tracks already lead to him or he has valuable gear. Call me unethical, but I find most of “ethics” human-ist as in race-ist. It is a justification algorithm for the most part rather than true ethics.