'How to Train Your Dragon Live': A boy's breathtaking dragons
At United Center, awesome creatures but show a bit shy on humanity The massive, high-concept new arena attraction known — more for marketing than artistic purposes — as "How to Train Your Dragon Live Spectacular" delivers state-of-the-art digitized backdrops, projecting flowers, waterfalls and mountains on more than 20,000 feet of surface in an attempt to envelop all comers in a mythological land of vik…