I was playing around with some water drop photography on the weekend, or more accurately, coffee-and-milk-drop photography for this week's 'Kitchen' theme. Hundreds of shots later, I'm still not terribly happy with the results, but I thought was one of the better ones of the bunch. I'm going to have to give this another try sometime.
Here's a shot of the setup for this. The android tablet is controlling the camera, which is set for continuous shooting. I set it off and let it go for around 20 shots (don't want to overheat the flash) and then check the results. Repeat 30-50 times or thereabouts. :)