The LAB at Rockwell has just released video of their Build Up! installation for the National Building Museum's annual gala. We thought the still pictures were cool, but seeing it in action is all the more impressive. This display comes from an interactive iPad app that let partygoers chose buildings from the iPad and "push" them up the screen so they would show up on the overhanging scrim. The location and height of their building would be determined by how hard and in what direction their finger moved up the iPad. Craziness, no?