The Web Graffiti: "Cranes are used in all industry related to construction and it’s been an ancient means of engineering by mankind to lift things. Cranes are heavy and lots of engineering in place to lift heavy loads. So have you ever thought of flying cranes which can carry a human? I came across this amazing concept of lifting human using RC helicopters which I couldn’t believe. After surfing online and watching a video on YouTube it looked like an extreme engineering."