Here we have America’s cuddliest psychedelic rockers teaming up with everyone from Bon Iver to Nick Cave to Yoko Ono to Erykah Badu for a deeply weird, profoundly disturbed head trip. The brash, deranged “2012 (You Must be Upgraded)” sets the tone -- Ke$ha and Biz Markie, together at last! -- and from there its all avant-garde freakouts and nuclear-campfire hippie jams with titles like “Helping the Retarded to Know God.” This is a lot to deal with, yes. Maybe start with the Jim James-assisted “That Ain’t My Trip,” -- a narcotizing delight for the opening line alone.