In tonight's dead letter, listener Chris takes us back to the early 2000s, when he was the head brewer at a restaurant on the east side of Cumberland, Maryland, in a building so old it served as a Civil War field hospital. One night after close, he and three coworkers were having a beer in the basement bar when the loudest sound he'd ever heard slammed into the floorboards right above their heads, shaking dust from the ceiling and rattling every bottle behind the bar.