So yea.. today I was puffin on my PD and I decided to show my brother that the vapor was indeed vapor, so I blew it into the smoke alarm in my room. Needless to say, the alarm went off right there and then. I was also really confused... how could the smoke alarm be going off if there was "no combustion" and only vapor? Anyways it has me wondering if what we are inhaling is in fact vapor or or just diluted smoke? What do you guys think.