" It had a very long pendulum, and the pendulum swung with a slow tick-tock that set his teeth on edge, because it was the kind of deliberate annoying ticking that wanted to make it abundantly clear that every tick and every tock was stripping another second off your life. It was the kind of sound that suggested very pointedly that in some hypothetical hourglass somewhere, another few grains of sand had dropped out form under you. "

― Terry Pratchett , The Light Fantastic (Discworld, #2; Rincewind #2)