“The sandpaper of Greg's laugh fascinated Lexi as much as it frightened her. It was why she always thought of him as the Sandman, an interpretation not as sinister as E. T. A. Hoffman's but one that seemed to match, suddenly, in its role as a harbinger of death. Greg's voice rebounded around the building, dry and abrasive. Mirthless laughter is one of mankind's trademark noises. It's been used to mask pain for centuries.”
Book:The Wake Up