The underground music scene in New York City — underground as in the subway system, not secret clubs — is characterized by a wide range of quality. Sometimes it seems like all it has to offer are mariachi bands that insist on playing only on those days when you have a splitting headache, got caught in the rain and just found out that your dog died. But occasionally you stumble upon a gem. This video from a Brooklyn station is precious not as much for the band’s rollicking version of the Grateful Dead’s “Me and My Uncle,” but for a small, bespectacled child’s joyful dancing.

The girl’s roof-raising jig gradually inspires a small hootenanny of strangers coming together in unfettered joy. At one point, her glee escapes from her in the kind of scream reserved only for the highest moments of elation.

Five minutes later, surely, all those people smashed themselves shoulder-to-shoulder into the human equivalent of a cattle truck. But for those two minutes, her joy was the center of the universe.

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Write to Eliza Berman at eliza.berman@time.com.