This billboard in London was programmed to show a boy pointing at British Airways flights whenever they pass over, showing each plane's # and origin https://t.co/3A0KNL0HHQ https://video.twimg.com/ext_tw_video/1774353562530656257/pu/vid/avc1/966x534/CyareDy11K-MFXra.mp4?tag=12