I captured this at the beach a few months ago. The tide was rushing over the sand so I was standing in a shallow river to spin the spiral.
Tool used was a blue acrylic tube with a pink plastic tip taped on the end. Check out my Instagram for pix of the tool. Torch used was the Lightpainter from @lightpaintingparadise
This is a single exposure:
10mm, f/4.5
ISO-3200, 30secs