Next Wednesday or Thursday possible, though it won't be after work.
I have some plans (and, handily, some stuff lying around I can build something with) in order to avoid the use of mathematically-interesting-but-visually-predictable cycloids. My IKEA 'Glansa' battery-powered electroluminescent string has been found and fished out but is unfortunately far too pathetically dim for use for this purpose.
Years ago I remember trying to get a sort of glowing helical light-painted tube-shape by whirling a light around and walking along. Didn't come out as clearly as I'd intended but with modern lights and a better camera it might be more successful.
Found:
2007-02-10_20-40-46_016 by wingpig, on Flickr
2007-02-10_20-42-08_017 by wingpig, on Flickr