I saw a movie about an old man who is living in a dangerous neighborhood.  Neither he nor his contemporaries can afford to move and so are very distressed…there might have been more to it but I don’t recall.  The high point of the movie is the VERY old man training and when his home is invaded by a young black man, he chains himself to the young man and I think, wins the fight.  I think the old man was played by a famous actor.