More bleeding edge drone technology from researchers at Stanford University from within their Biometrics & Dextrous Manipulation Laboratory; a drone that can land on ceilings and walls using micro-spines, basically clinging to the wall or ceiling. 

Obviously the real world applications of such a drone are numerous, especially in natural disaster areas where real time updates are required without worrying about battery life. Restricted to areas that are rough at this point, nicely explained in the video below: