Did you see Marty McFly and Doc Brown materialize today in a DeLorean car? Remember, today is October 21, 2015, the same day the two time travelled here in "Back to the Future II." If they did arrive today, I am sure they would be disappointed to see no hover boards. However, the good news for them is that they could easily conjure up a video of Marty McFly on a hover board simply by viewing the movie on a smartphone, a device absent from the movie.Okay, your humble correspondent is a big fan of the "Back to the Future"...