People sell dull throwing knifes, but you can throw an ordinary knife if you are careful. Here you go!
Step 1: How to Hold the Knife
Hold the knife like this.
Ow! Cut myself. Be careful
Flip the knife over like this.
Step 5: Now Throw
I can't really explain this part. You'll have to do it by yourself.
I'm not responsible for stupid people doing stupid things.