The Guinnes Book of Records verified that the artificial tornado in Germany's Mercedes Benz Museum is the world's largest man-made twister. It's 34.43 meters (~113 feet) tall, and contains approximately 28 tons of air. It takes 144 jets about seven minutes to produce. It was created to suck smoke out of the building and save lives should a fire start. In the picture, carbon dioxide is being sprayed into the bottom of the tornado to make it visible. It's awesome, and I'm thinking about modifying my bathroom exhaust fan to produce something similar. I don't really understand the science behind it or anything, but I'm pretty handy with power tools. Okay, so I'm not very good with power tools. I can swing a hammer. Fine, I'm lying. I can wield a screwdriver with the best of them though. The vodka and orange juice version at least.
A bigger version of the picture after the jump.