I have no idea how he did it, but my friends dad blew his entire toke in to his hands and sealed it there for a minute, and inhale/exhaled to show me had no smoke in his lungs, then he put his cupped hands to his mouth, blew in to them, opened his hands and there was a perfect smoke ring. I think me might have taken in the smoke again and just made a regular one, but it looked amazing, especially when you're stoned.