The "what should you dos" are fun exercises. I always get myself fouled up though, because I know you can't predict what you'll do in the first situation. There's no time to ponder the ramifications. You just react. So there can't be a "should."

I think you'd see people on the track and swerve to avoid them. You wouldn't have time to think about the consequences.

The second case revolves on the Hippocrates Oath: First, do no harm. You can't kill one person to save another.