Why do Indians honk so much?

I don't have the first clue, but it is indeed a unique phenomenon. Maybe we think that's our way of asserting the 'right of way', but I suspect there's a more profound reasoning.

But what took the cake was this incident at the airport in Delhi. The airplane got an apron parking position, and the bus in which we were going to the terminal had this absurd driver, who actually honked at an airplane that was crossing over. This driver was losing his patience on having to wait (without any traffic signal, that too!), so he promptly put his palms to good use.

On many other occasions, I've also seen drivers honking when there's no one else on the road. Maybe to keep his senses in play?