Legalization has allowed Colorado weed growers to make their product freakier and more potent than ever. "One guy came in and said, 'I haven't smoked since 1972. What do I do?'" says Brad McGinnis of Dank-Colorado, a top Denver dispensary. "I recommended to him, 'Take a couple of puffs and put it out.'" For these three new strains, all of which have seriously elevated THC counts (between 26 and 28 percent, compared with 18 percent for average bud), we might add: Call a neurosurgeon.