if this is true:
When one yawns, his or her alertness is heightened, as the sudden intake of oxygen increases the heart rate, rids the lungs and the bloodstream of the carbon dioxide buildup, and forces oxygen through blood vessels in the brain, while restoring normal breathing and ventilating the lungs.
then if you take a hit then yawn about half way through it, then wouldnt you take that hit striaght to the head?
and if so, you should try it out and tell me houw it worked.
will try