ive been smoking for a year,, no allergies or anything,dont smoke cigs, i dont have asthma either...i smoked with tinfoil a lot of times and it was fine, but when this started,there was a little piece of tobacco with the weed it was there cuz the weed was in a can with a cigarete and some fell out...when i inhaled, it burnt my throat alot and i noticed some tobacco got in, and that was about a week ago its gotten better but a little shortness of breath...