Hmmm. I keep thinking "Up in Smoke," but then I spotted a copy of the DVD in the bin at Costco the other night and that might be influencing the memory. We do have WoSaT though and we are overdue for a viewing. My google-fu let me down, btw. I tried searching for movie quotes with "must be physic" but the only movie Google located with the quote wasn't one I've ever seen.