On Saturday we went to the Flugtag. I'm told Flugtag means flying day in German. A few of the basics: Human-powered flying machines are launched off a 25-foot ramp above the Inner Harbor. All flying machines must be entirely human-powered (no external energy sources or stored power). All crafts must be less than 30 feet wide. And finally, no matter what they say, size does matter -- all crafts must weigh no more than 450 lbs. (including the pilot). We weren't expecting 70,000 people when we down there. We ended up sitting on Federal Hill (the big hill in the upper left of the video) watching the big screens. The idea of sticking even your toe into the harbor is pretty gross, but watching these guys fly into the harbor was not a bad way to spend the afternoon.