mineral oil on vibrating aluminum bar - I helped my friends at Propadata Films to create a promotion video for the Fluke Corporation's new 810 vibration meter. Using a Phantom HD camera they captured vibrations at 1000fps to show a hidden world that is too fast for the human eye to see. I provided technical vibration assistance... and a bunch of tools.
See the video:
http://www.youtube.com/watch?v=W4s2UwKm7dc
Fluke site:
http://www.fluke.com/Fluke/usen/solutions/vibration/vibration-see-the-unseen.htm?trck=vibrations