Ah crap.
I had a cigar(ette) on Cotopaxi back in the late 90's - it was the only way I could tell if I was still %^$#ing breathing at that altitude.
Add to that the "pucker factor" of actually BEING an active volcano, the question of "Why the &^%$ are we going to the top of it??" does tend to repeat itself and make you VERY nervous....
