I remmeber about 10 years ago a friend and I were trying to smoke pot out of a coke can. His uncle came outside and I accidentally blew into it and all that (nasty regs) weed was all over the ground and we couldnt pick up any of it because it was broken up too fine. Well, I tried to get a buzz off of a cigarette, and didnt work. I smoked another one right after that and it worked! I got sick. I was puking all over the place.
Just a few weeks ago, I was at a friends house and I had too many american spirits in a row. I got tobacco poisoning again. Except this time, I didnt puke. so for about 2 hours, I was blue in the face, feeling like death and incoherent and unable to drive.
Treat tobacco with care, its medicine used in small doses and poison in large sometimes recreational doses.
http://en.wikipedia.org/wiki/Mapacho