We had always wanted to do an app based on ARKit. Then, out of the blue, Facebook asked us to do an interactive demo explaining their new Millimeter-Wave Mesh technology…”oh, and having it ready in four weeks would be great!” It was challenging, but we managed to master ARKit-based tracking and create an interaction concept storyline, related 3D content, and a physical model in time. We successfully presented the result at the TIP Summit 2017.