A super cool video of a racing car shock on a dyno. The difference with this video is that they've made a clear body for the shock, so you can see the cavitation, and if you look carefully even see the shims bend. Amazing. http://www.suspensionhotline.com/dyno/images/VMA_clear_shock2.wmv I'll be changing my oil way more often, now that I've seen what a hard time it gets. And the second video shows a lap of a track being fed into the dyno and shock doing its stuff. Huge velocities involved for sure. You see the piston at the bottom, then at the top, but you don't see how it got there, except for the bubbles telling the story. http://www.suspensionhotline.com/dyno/images/VMA_clear_shock1.wmv Jaw dropping stuff. I thought so anyway.