A sight from public transportation (2 of 2): Welding.

The other week, I was taking the subway north of the city, and as we were pulling out of this one elevated station and twisting away, I looked back and tucked under the station side were 2 workers in neon green vests, welding the underside of the tracks or platform or something, sparks just flying everywhere in a patch of orange that just got smaller and smaller as we pulled farther and farther away.