I like throwing knives I'm not as good as I would like to be. But it can be pretty fun puttin a playing card on a chunk of wood and getting a few people over and seeing who can hit the card and get it to stick.
"come on you sons of b***hs! do you want to live forever?" Sergeant Daniel Daly, USMC, Belleau Wood France June 6th 1918
"You can be as mad as a mad dog at the way things went. You could swear, curse the fates, but when it comes to the end, you have to let go" Benjamin Button
Knife throwing is all about consistency. Throwing the same way each time at the same distance from the target will result in the knife hitting the same way.
Change the distance, change the impact.
Right distance and it will stick every time (discounting human error)