You overestimate me, Slip! I really have only just this year gotten into the deep science of it. The only stuff I've done till now has either been reading all Dave's books and mags, which are basically like manuals for heart-doc plumbers and electricians, or practical stuff like paramedicine/first aid, which doesn't deal with the science as much as the practical procedures. So I'm really only just now learning about the chemistry of how pulmonary absorption works. Like literally within the last few months as we've been, yep, cutting up dead people's lungs and learning how all the goodies get into and out of us through there. (And the baddies.)