The app was a single, iridescent shard of glass the size of a thumbnail. You pressed your thumb against it, let it draw a bead of blood, and then you closed your eyes. The map burned itself onto your optic nerve: a three-dimensional lattice of tunnels, conduits, and forgotten transit shafts, overlaid with pulsing red heat-swarms. Every rat. Every heartbeat. Every migratory surge.
(rat) and a variation of (shoe / brake pad / a common Spanish surname). ratvizappata