An out of control trolley carding is speeding towards five people tied to a track, but you can pull a lever  and make the trolley swirl onto another track where only person is gonna get run down, should you do it?

This time there’s no lever  to make the trolley swirl, but there’s an obese man standing next to the track and you calculate that he weighs just enough to derail the trolley, do you push him in front of it ?