Photo I (Rob) made for a photography challenge at www.pxleyes.com

Simply took a wineglass, put a piece of rope in it and put it under a running tap. The bubbles you see are the water and air seperated. Made this image with high speed.

Shutter speed: 1/500 sec
Aperture value: f/8
ISO: 400
Focal length: 5,0 mm
Flash: Fired