Mr. Emerson, what practical advice can you give a man in his mid 50's about defending himself with a knife. I don't have any illusion that at this age I can become proficient enough at martial arts esp because my physical skills will continute to decline. Much of what I see on the internet about knife fighting looks like it was just made for tv. I need practical, effective advice on what to do if I need to defend my life with a folding blade. Thanks in advance.