Indie has re-invented the Domino’s pizza Delivery service with “sound advertising”. Domino’s scooters are all electrical and thus silent. And silence may become dangerous. Instead of creating a common vroom sound to warn the passers-by, they have created a panel of sounds linked to the handlebars motions to advertise for Domino’s like: “Humm! Tasty Domino’s Pizza…” A successful guerrilla advertising operation