Slow-motion Hole Pulsation

In 2006, a friend of mine – actually, Pete Halvorsen, head of the International Trepanation Advocacy Group (ITAG) – invited me to visit. A friend of his was a sales rep for a scientific camera that could capture very high-speed events at fast frame rates. While the phenomenon we were capturing isn't exactly high-speed, it was some interesting material on which to test the camera.

The following demonstration of pulsating the hole by internal pressure was shot at 100 frames/sec (30% real-time).