I trained for knife fighting about 25 years. prefer gun anyday. At least the way that guy was holding his knife is more defensible than the better way to hold it in the reverse position. That old guy had a jacket. You have two choices lay down and die or go on the offensive. worse thing that could happen is you will die. At least you will die after some good knee kicks and maybe get a fist in the throat or ram your finger in an eye socket.