null - Rain Codes

With barely 100 hours of sunshine, Hong Kong's monsoon season is the best time of year to lure people to the sunny Philippines. But Cebu Pacific Air, the national budget airline, is not the only one offering escapades and needed an idea to outsmart the bigger airlines. Using innovative water-repellent technology, we hid QR codes in plain site across town and waited for the train to make them visible. The timely "rain codes" led to a mobile booking engine with special offers on flights to the Philippines. Once the rain stopped, the promo codes expired.