Early in their 1978 film debut, “Up in Smoke,” comedy duo Cheech & Chong inadvertently expose a bit of systemic corruption. Still stoned out of their minds after being picked up by the cops for driving around Los Angeles smoking a massive joint, the two are hauled into court. Noticing that his new friend Anthony ( Tommy Chong ) is spiraling into a bit of marijuana-induced panic, Pedro (Cheech Marin) approaches the bench to grab a glass of water sitting next to the judge’s gavel. Anthony takes a gulp and spits it all over the courtroom floor, exclaiming that the cup is filled with vodka. With the presiding judge’s faculties called into question, Anthony and Pedro are let go on a technicality, free to seek out their next high. The grass is greener — and far more potent — on the other side of handcuffs. With 4/20 fast-approaching and state-level marijuana laws changing all over the country, the stoner buddy comedy has never been quite so relevant.…