Sliding forward at a speed almost, but not quite, matched to the steps below it, the escalator handrail introduces a faint discrepancy into every ride, a slow drift of the hand ahead of or behind the body, corrected constantly and unconsciously. Riders grip it more out of ritual than necessity, palms absorbing a light film of rubber residue and the hands of every stranger who rode before them.
At the top and bottom, it disappears smoothly into a slot, an act of vanishing performed so many times a day that no one watches it happen anymore. Small children are warned about it specifically, its edges the subject of cautionary signage in a pictogram style found nowhere else in modern life. It offers stability without quite promising safety, motion without asking to be trusted, and in this it resembles a great many small mechanical reassurances we accept without inspection.