Instructables user alexthemoviegeek made this power loader costume from the movie Aliens with just $225 worth of supplies. It's mostly made from wood, foam, PVC pipe, and pipe insulation. At the link, you can watch a video of the completed costume in action.
Link via Great White Snark
My former boss did one too, but not good as that one: http://hallert.net/powerloader/index.html ...
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