As always, good informative review. I have a quick question, which I think I know the answer to; I just want confirmation. When you say nose exhale, you are referring to sort of shifting the smoke into the back of your mouth and blowing out your nose? Cause I really can't imagine the alternative.

As a cigarette smoker, I will very rarely take a full drag from my cigar, forget what I'm doing and inhale... then spend the next few minutes coughing uncontrollably with tears streaming from my eyes. Talk about ruining a good smoke. Fortunately, that's only happened a couple times.