I REALLY dig that first knife throwing technique you showed. Can you accurately launch a knife over distances similar to conventional knife throwing techniques like that? I tried with a ballpoint pen and stick (I have no access to a knife at my current location) and found it pretty accurate with some practice.
Your spoon atlatl inspired me to try something similar with my fingers, thumb and pinkie holding the pen and index launching it. And again I found it to be ok accurate and I guess practice will do wonders.
In your "Various ways of knife throwing" you show various non-spinning techniques. How accurate are those? A video focusing just on non-spinning techniques would be cool. I don't think anyone has done that before. Wonder why
Sorry for the loaded comment. Your videos are awesome!