My Boss...
... cannot physically smoke. At all. One night after a shift in the bar I work at myself and one of the girls I work with were sharing a joint when he came outside drunk as a skunk and demanded some. He took a drag but couldnt bring himself to inhale and just blew it out. My workmate offered to give him a blowback, so put the joint inbetween her lips, cupped her hands round her mouth and his and told him to just breathe in on the count of three.
One...two...three...
He immediately puked in her face. The joint was ruined too.

As a side note, bosses brother (a chef, no less) also works with us and had never smoked weed before either. He came to my house for a smoke and asked if he could roll a joint, I was dubious and asked if he even knew how. His answer?
"Yeah. Well, I can make spring rolls."
I can clarify that line is a lot funnier when fatigued/drunk/stoned.
(Formaly Over say's hello, Mon 20 Sep 2010, 3:37, Reply)