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This variation on It's Always Mardi Gras in New Orleans, just has to be an established trope... Basically it's where in any given chase scene going through a Chinatown, the chase will always have to go through a dragon dance, despite it being nowhere near the Lunar New Year.
It's invoked on the Friendly Local Chinatown page but... that seems to be a more general "Chinese things happen in Chinatown" than the getting tangled up in a dragon dance that I'm thinking of.