The bong rips may make you cough, but I believe it's the cigar residue that you're coughing up.....I'll tell ya something I learned firsthand in the 70's about pot and cigs...I had been tokin' the 'erb for about 8 years, a LOT of 'erb....I had a lung collapse while on a date in a small piper cub (yeah really neat getting blowjobs while flying a plane)...docs decided to explore to find out why....When I woke up, and was awaiting the surgeon to tell me details, I had decided I needed to tell him I was a toker......well, he started out telling me he could tell I never smoked....oh yeah, tell me more....said my lungs were very pink and healthy other than the cyst....he also showed me lung tissue of a 10 yr pack a day cig user...viewing that shit would make anyone stop tobacco......while in ICU after the surgery, one of my nurses would bring me a joint and we used a looooonnng straw to smoke it out the window....