Even though this is not computer security related, it was such a cool display I had to share it with my hacker buddies. I guess you could call it hardware hacking of sorts, with cool science principles. Make sure you re-watch the first few seconds a couple of times to get the full effect. I saw Doktor Kaboom's Smoke Ring Cannon at this years Kentucky Renaissance Faire. Now it's time to make one of these things for myself. Check out Doktor Kaboom's site at:
http://www.doktorkaboom.com/