Most creative Halloween costume?

I guess my most recent favorite would be the diaper wearing insane astronaut. We painted those white paint protective suits orange, made the patches based on a picture of a real orange astronaut suit, got some silver dryer vent tubing, duct taped a couple of cheap clear plastic bowls together and cut out holes for face, neck, etc., got some orange feather boa for trim, and a white baby blanket with glued sequins as a diaper. It was the year that astronaut was cheating with another astronaut and she put on diapers and drove for hours to "talk" with the other woman. Instead of pepper spray we carried silly string.