There is a huge discussion on throwing your EDC knives and some people, including me, concluded its not really practical.
Check out this post
http://www.bladeforums.com/forums/showthread.php?t=400147&page=2
I concluded from that post that,
-knife throwing might not be practical in combat situations, especially if its your last weapon, you might very well be disarming yourself.
-Depending on what kind of life experiences the assailant had, it is still possible to move out of the way in time. (evading incoming torpedoes)
-Attacking distance varies all the time (constatantly having to adjust or you have limited distance and throwing opportunity)
-targets are always moving which reduces the chances of a stick.
-If they have a gun, depending on the situation, you most likely have to comply to their demands in order to live.
-Estimated chance of sucessfully striking the target with 1 folder including all this variables, 15% or less (unless U can suprise them)
I would recommend getting a well built folder and take up knife combat courses instead. If you really still want your idea to work, you need to practice with the future EDC folder and you might break quite a few in order to master something that might be potentially not really be useful in combat situations
I hope this helps,
Peace