I didn't smoke the clay at school, but heading out with it before bed right now.
By the by, I'm getting rather fond of slow-smoking (for me at least) with my Peterson 307. It lasts me 55 minutes almost on the nose (within 45 seconds plus/minus) every time now. which is great because that is how far the walk from the university (my school) to University (the street I meet my ride at) is.