To mark its launch of Sky Dreamer in Chicago, Puma worked with Whisk, Firefly and Havas Media on holographic displays of the basketball shoe on vehicles parked at city landmarks. "Holograms have never been used as an integration into a D-OOH channel before, so [the] stunt is not only delivering the Puma brand message but also celebrating the innovation in one of the fastest growing media channels," says Whisk co-founder Matt Wilkinson.