You might be expecting Halloween trick-or-treating neighbors but instead, it's the opening number of The Book of Mormon. Ding Dong: this national tour production matches the verve, if not the sharpness, of the original Broadway production. The musical about two mismatched Mormon missionaries assigned to Uganda is a profane comedy with cheeky exuberance. Not just a thunderous Broadway hit, it's a flippant assertion of demographic power, the irreverent voice of Gen X. This 2011 best musical Tony winner can be seen at the Pantages Theatre in Hollywood through October.