Above: Thomas Elefante, Kari Spieler, Shaun Savage and Adam McHeffey of Swear &amp;#38; Shake performed at B.O.M.B. Fest. on Saturday, May 28, 2011. (Photo/Adriana S&aacute;nchez) The folk pop quartet Swear &amp;#38; Shake appeared at B.O.M.B. Fest Saturday afternoon, rendering an expansive, majestic, harmony-heavy sound that left crowds all warm and fuzzy. So, it&amp;#8217;s hard to [...]