This is the story of the Sainsbury’s tunnel that unexpectedly won Christmas in Britain in 2018. After the supermarket became a tongue-in-cheek local attraction on TripAdvisor, we saw an opportunity to transform an internet joke into a jaw-dropping Christmas light spectacle. Taking the joke further than anyone could imagine, we decorated our tunnel with an immersive light and music experience, powered by 100,000 pixels of LED light. Always one for whimsy, Britain delighted in this preposterously magical sight, set so incongruently in a drab supermarket car park. A brilliant brand experience that morphed into a true internet phenomenon.