" At the same time I dismissed a strange bodily sensation that had run the lower back half of my body, during which the base of my spine had seemed to move. It had moved. Not a normal moving as in forward bends, backward bends, sideways and twistings. This had been a movement unnatural, an omen of warning, originating in the coccyx, with its vibration then setting off ripples – ugly, rapid, threatening ripples – travelling into my buttocks, gathering speed into my hamstrings from where, inside a moment, they sped to the dark recesses behind my knees and disappeared. This took one second, just one second, and my first thought – unbidden, unchecked – was that this was the underside of an orgasm, how one might imagine some creepy, back-of-body, partially convulsive shadow of an orgasm – an anti-orgasm. "