Pani puri, Mumbai's staple street food, has strict rules of etiquette - you only get one at a time, wait for the vendor to serve everyone else, and ask for a dry puri with potato to kill the spice at the end of a six-puri serving

Pani puri, Mumbai's staple street food, has strict rules of etiquette - you only get one at a time, wait for the vendor to serve everyone else, and ask for a dry puri with potato to kill the spice at the end of the serving of six, Aug 2016© Getty Images