That's a neat technique, but not at all necessary, if anything I would assume it wouldn't burn as hot due to the lack of oxygenHere's what you do, you get a hash pipe that has a screw on bowl cover with a little hole in the center. You put your material in and put the lid on and just suck the flame through the hole enough that you hear a sputtering sound. That sound means you're gonna get wasted. I think the lid holds the heat in more, like a little oven, and makes it vaporize better. People who smoke it in an open pipe or a bong probably only get a light dose. If you smoke it in a joint you'll feel nothing at all.