Seth Rogen's recent mellow-harshing bust notwithstanding, there has arguably never been a better time to be a pot aficionado in the movies. Or at the movies. Or returning to the movies — or to the road, anyway, as evinced by new reports of Cheech and Chong's cannabis comeback. Basically anyone who can approximate stoner bliss is ready for prime time these days, from the principals of Harold and Kumar to Pineapple Express to Smiley Face (to say nothing of Hall of Famers The Big Lebowski and Up in Smoke), notes a pot-film scholar who miraculously focused long enough to taxonomize and rate them: