tried this method a while back, it was great! get a helmit and a pipe or bong (pipes probably easier), put the helmit on, open the viser and take as big a toke on the pipe as u can making sure before hand that all the vents are closed, close the viser and slowly breat out.. hoepfully u shouldnt be able to see a think cuase of all the thick white smoke! u'll gett like 5 good hits of it before u feel like ull pass out or wen all the smoke goes, which ever comes first lol take the helmit off and lie back...enjoy
If you have a gas mask (like the army uses), you can make a sweet...uh, smoking device out of it. I saw something like it online. http://www.collegehumor.com/pictures/9626/
Yah, its what you gotta do to blow smoke out through the J. Like I said in another thread here, it sounds worse than it is. Took a while before I had the balls to try shotgunning someone else. Just close your lips around the middle of the blunt or J and keep the cherry just kinda hovering in the middle of your mouth. Then blow out, it will push the smoke out through the J the way it usualy goes, but instead of sucking smoke in, you're pushing smoke out and into someone elses lungs, or in this case a glass...