Before i ment "Chimneying" seems retarded to me. I don't understand why people leave smoke in their bongs in the first place, just hit the carb.

If you're smoking alone you should know how much smoke you can take in one hit(unless it's your first time or something in which cases you won't know how to "chimney") you should just carb it, if you're smoking with people and you can't take the rest of the smoke, put your hand on top of it and pass it... why would it stay in the chamber for mintues?