I love making costumes, and this is my wife's costume this year. It's a set of wings that I call "Steampunk Archangel". They are 14'8" wide, and can fold up to be about 4' tall and 18" wide. The picture isn't superb, but you can see on the back that the wings are connected to a series of gears that allow them to open and close, perfectly synched in unison. They are opened "automagically" by pneumatic pistons.
The costume was debuted at BlizzCon 2010, last weekend.
