[Sheldon J]

So you stop a safe distance behind, dial 911 on the cell, if it is possible hit them with the high beams, honk the horn, in short distract and take notes She could have been a hitch hiker that attempted to mug him. If he leaves offer assistance. You do not know what the situation is, so unless it is in the defence of human life you gun should be holstered, and stay in contact with the 911 operator. Just thoughts on what I would try and do.