the "millennial whoop"

When I was texting with Sean while he was in Paris (he's on his way back to the States, now, I think), I got a couple short videos from him (i.e., cell-phone videos that he recorded while he was on the streets of Paris) that included the sounds of police sirens. I jokingly told Sean he needed to write a cello composition based on the two notes of the siren; Sean shot back that "the Zeitgeist has already done it." The two-note combo is called "the millennial whoop," and it's all over the damn place. What's more: it does kinda sound like the French police siren.