Give me an evening at home with nothing to do and chances are I'll end up trying to figure out some new lighting technique, so here's a little homework for anyone who wants to play along. This is a single exposure, full frame, not rotated or flipped or otherwise distorted in any way. So what is it, what direction is it travelling in, how many lights are there and where are they positioned? I'll tell you next year!

Bubbles or drips?