I use my Gunting as a utility EDC, as I have said many times, and I will do so again as soon as things calm down enough for me to carry it in downtown Washington, DC, again. Right now, everyone, and especially the cops and the security people in my federal office building, are just to keyed up to want to risk a confrontation over a knife that, while legal, looks so intimidating. I have a Meerkat for "in-town" purposes, as well as the fact that it is a neat little toy.
We have worked the theories of Bram's design of the Gunting to death by now, so I shan't rehash them, but it surprises me that nobody here seems to know much about James Keating and his theories. He is the prime modern proponent of the Bowie Knife school of fighting, and has a number of tapes out on how to use a Bowie in a fight. Many of his demonstrations are done with Bill Bagwell's Hells Belle Bowies, and one of his best techniques is the "back-cut". I'll try to describe it from what I have seen in films and read, but it requires a really sharp tip and works best with a clip point, such as on the classic Bowie Knife. After you make your forward cut, using the regular edge, the knife is sort of cocked forward in your hand and your hand and arm are swung across to your off side. To affect the "back-cut", as you bring the knife back, snap your wrist so that the knife is cocked back toward the wrist instead of forward. As you do this, the point should rip across the target, causing considerable damage. From pictures that I have seen of what it has done to practice dummies, the Chinook, as it comes from the factory, will do truely terrible damage with a properly done "back-cut". If I remember correctly, according to an article that I read, Keating says that the technique is an effective surprise move, because most opponents will have no idea that you can do that with a knife.
To answer the question that those of you who have followed my posts are about to ask, "Why should a Quaker be interested in Keating's Bowie Knife fighting techniques?" Blame it on my childhood. I fell in love with knives when I saw Allan Ladd in The Iron Mistress and then the old Jim Bowie Show, so I have a fascination with the knife, with the man, and anything about them.