Jackie Driscoll of South Boston, jogging along Wollaston Beach         in Quincy, Oct. 5, 2011—‘‘I was adjusting my earphones on my         Shuffle, listening to Beyoncé. It keeps me going. You know how         everybody says running clears their head? It doesn’t for me.         I’malways thinking about what I’mdoing next. I deliberately         don’t have my phone with me, because you listen to music on your         iPhone, your phone will still ring. You still get e-mail alerts         and text. I’ma physical therapist. This is my chance to get a         break. I like running along the water. It’s better than the         gym.’’