Have you tried "spear" throwing without any rotation of the knife?
I played around throwing my dog father one day. I was impressed at how much it dug into wood even when thrown softly! <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />
JYD#10 Blade '08 - I challenge coined Dan Busse and WON! Blade '10 - The score is now 2-0!