“Halloweed” (* out of four) was a disastrously lame stoner comedy no matter how much you smoke that makes “Half Baked” or “Pineapple Express” look like Noel Coward by comparison. In a Midwestern nowheresville town called Mooseheart, two pothead losers (Simon Rex and Shannon Brown) show up and get swept up in a murder investigation involving weed and other assorted mayhem that neither Cheech nor Chong could make heads or tails out of. Incoherent comedy/adventure/horror movie changes moods and style with each scene and is done in by annoying characters and a stupid script. Great title, though. Watch “Halloween” again instead.