Spinning a spiral in the train tunnel last night.
A simple tool was used for this one...just a torch. The Lightpainter torch from @lightpaintingparadise
to be exact (swipe left for pix)
I had it set to a 5ms flash strobe mode.
This was captured in a single exposure but my legs and feet were clearly visible so I removed them in Photoshop.
Camera settings:
10mm, f/16
ISO-800, 32secs
Graffiti by the amazing @mrbasix