its not its a legitimate question. The derespina is 154cm (unless you request another steel) and double edged. Same shape as the AUS8 single edge of the cold steel tiger. That vietnamese guy with the tiger knew how to use it and knew advanced techniques and even incorporated flips. in some scenes if he could have done a flip on the return the back edge of it would have done cuts. in one case he could have hit the wrist. A single edge Karambit has a lot of techniques that you cannot do with a double edges (controls throws blocks etc) but the double edge gives up defense for a whole extra set of offensive strikes. I would NEVER recommend using a double edge karambit unless you know what your doing. but if he has the Derespina karambit, with what he aknew about karambits he could have got a lot of important strikes in. Because with a double edged karambit, you can go on a faster offensive with more versatile strikes. He could have defended with a double edge as well but I am not sure what would happen with the blade on blade thing. my main point for saying that was the scene where he defended with a flip to the hand to knock it back a bit
the blade would have caused a massive advantage. still a great movie though. Oddly enough the vietnamese guy (the bad guy) was actually secretly a nice person