The first time I saw David Cummings, he was doing laps in the shortie pool at the Flagstaff Days Inn. Armed guards were pressed against the breakfast room glass, watching as he shifted from one end of the pool to the other, appearing just for a second in two places at once as he swam an infinite lap. They were all pointing and jabbering and trying to sneak video on their phones. But me, standing alone at the side of the pool? . . .