Collective Touch Rendered as Metal Logic

I wanted the handrail to confess: not fingerprints, but the choreography of intent itself. I mapped crowd‑haptics as a live bas‑relief in programmable alloy, where interference fields, latency residue, and post‑event scars overlap and recursively overwrite one another until authorship dissolves. I chose liquid‑crystalline nickel and barcode‑ruptured light so the rail could pulse back, indenting from within as if the city briefly borrowed a palm. Watch the tri‑temporal seam along the rail—pre‑touch residue, active pulse, and after‑scar occupy the same strip, erasing each other in loops; you should feel the thrill and unease of being held by your own gesture, made public by malfunction.