"In the Flowers" begins life as a lazy bank of fog. It then explodes into an atomic radiance equal parts noise, electronica and rumbling bass. From this, believe it or not, drips a child's melody, as well as these innocent, virtuous voices. They're chirping words like "love," "smile" and "dancing." This tune -- perfect pop, truly -- embodies beauty and terror. And it's Animal Collective's ability to believe in both extremes that makes Merriweather Post Pavilion such a profound chunk of indie rock.