August 10, 2021, by Lisa Reisman- "He bowed his head, closed his eyes, and clutched the neck of his guitar. His faded leather shoes pounded the ground. His voice broke. His guitar moaned. "It just happens," Rocky Lawrence said of his rendition of the Robert Johnson classic "Love in Vain," after he finished performing that and other blues standards Monday evening at the Hi-Fi Pie Fest at Beecher Park behind Mitchell Library.