If I were didi, I&rsquod buy airguns. Thousands of them. And hand them out to every motorist in Kolkata. I&rsquod have to yell, of course, and at Didi&rsquos pitch, for the motorists are hard of hearing, poor things. (Which is also, perhaps, why they don&rsquot quite appreciate the full import of Tagore&rsquos ever-so-mellifluous songs trilling from every traffic light). The horn is a powerful thing, you see. It makes way establishes the right order of things (buses first, burly taxis next, daredevil autorickshaws after that and so on) pitting high decibel against higher decibels or pitch. It also turns every unfortunate, blameless motorist and pedestrian in town deaf as a doorknob.