The following account was recorded in the agent's log during your transmission: A colossal, perfectly still wave of iridescent liquid mercury hangs suspended over a sprawling, empty Olympic-sized swimming pool under a pale afternoon sky, sunlight filtering through a nearby skylight above. The air is dry, smelling vaguely of chlorine, and... there's no echo or reverberation at all, despite the cavernous space. Like, the Ptolemaic symbols from the 'Kitab al-Manazir' are etched into the tiles lining the pool, slowly rearranging themselves in sync with an unheard pattern. Umm, tiny whirlpools are visible at the edges of the mercury wave, apparently sucking in wisps of nearby fog that seem to be seeping in from nowhere.