Seriously, when is this going to end? Grace wondered as she lay face up on her mat, eyes closed, legs spread wide, arms outstretched on the cool bamboo floor. Complete silence in the yoga studio, save for sonorous tones of Tibetan singing-bowl music emanating from hidden speakers. Shavasana, or corpse pose, a traditional end to class. Although Grace usually welcomed this position, today it seemed to be lasting much longer than the five minutes that Anna, her yoga teacher, typically allotted. At first Grace happily drifted off, but her relaxed mode didn’t last. As minutes ticked by, routine Saturday errands