knife tutorial:
http://www.youtube.com/watch?v=A2kr1gcmRWo

music:
https://www.youtube.com/user/Marindoom/videos

Disclaimer:
i hold no responsibility for any damage or injury caused if you try to re create this weapon.
if you do make this weapon be safe and always wear glasses when using it.
always use this weapon in a safe and controlled environment where no one is in danger because of your actions!
don’t be an idiot!

This is a video is promoted by a collaboration with theartofweapons and MyGunfreak`s Channel. Both channels persue the same goal and basically build similar things. If you whant to see more on the topic of the video please visit the two channels:
http://www.youtube.com/user/theartofweapons
http://www.youtube.com/user/MyGunfreak