I carry a Exacto Knife lock blade if you can believe that. It was given to me by "Tink" the RLSH & clips to the front of my Level III vest. BUT I only use it too cut seatbelts & such on wrecks, a trick I learned from paramedics.
Also It's the sharpest "Knife" you'll ever own, when it dulls you just change the razor blade. & if you have a hardware store, you can get one. I don't know about throwing sharpy things at people. I took a little kali, & was taught why throw away a perfecly good knife?
Not to mention all these guys who throw Knives in circuses & movies are at exact distances from thier targets & have practiced for decades & that's why they make it look so easy to hit something with a knife.