It was during “Run Like an Antelope” when the giant guy in the Godsmack shirt behind me finally lost his shit.  Those of us sitting near him at Night Three of Phish ’s nine-show, three-weekend run at the Sphere in Las Vegas had seen the telltale signs coming hours before: He’d never seen Phish before; a friend brought him to the show; he was a metal guy but open-minded. At the break between the first and second sets, he talked with us about how impressed he was, how he didn’t know what to