A pair of slinkies pushed together to look like a single two-tone object, bent into a curve, and lit with black light.
The comment about yesterday's slinky PAD - http://www.pbase.com/ed_k/image/95023987 - being the last black light for a while overlooked the fact that I had made two of these slinky images and wanted to share this one, too. This is really the last one.