Anyone ever done anything outrageous for a Halloween costume?  The best I've ever done was make my own, of a Pac-Man Ghost.  It was pretty awesome, but I don't even have any pictures.
Basically, I took some shiny blue fabric from a fabric store, about five times the length of my body, maybe a little more, and an old umbrella.  I did everything by way of tape, since I'm a man, BTW.  I cut the fabric in half and draped it over the umbrella, evenly, so that it made a cross when flattened on the ground.  I taped the edges together, did a little cutting at the bottom, and then inverted it, so it would have a smoother connection area thing where the fabric ends met.  On this side, using tape again, I made a W mouth and two L shaped eyes.  Then, for effect, I cut the the bottom with a /\/\/\/\/\/ shape and cut out some eye holes in the side, since the ghosts always walk sideways to where they are looking.
It wasn't too shabby and only took a few hours.  I'd guess this was about three years ago, to boot.