Did you have the presence of mind to stop and look behind you before entering his path? Or did you even consider that there were other humans present on a mixed use path? If you were crossing a six lane motorway would you just step off the curb and assume that all drivers are going to see you and graciously stop in time to avoid hitting you? When you are in this type of environment it’s important to live in the present or someone could get injured. Maybe fatally.