Walking pens

When I come out of the grocery store, I can sometimes see my car parked right over there.  As a kid, I watched cowboy movies in a movie theater.  Sometimes, the cowboy would whistle and his horse would pull himself loose from the hitching bar and trot over to where the cowboy was. I have been on the lookout for ballpoint pens that will roll or fly to where I am, conveniently getting to me instead of making me come to them.  Same deal with that car of mine parked right over there.  I am confident that with smart cars, there will be an app installed on the internal radio/ electronics that will enable the car to hear me call, start up and safely drive to where I am.