English: This video shows a Federal .22 Hollow Point shot into Clear Ballistics oil-based gel. The wound cavity pockets collaspe creating bursts of light or sonoluminescence.
The video was captured with a Phantom v12.1 high-speed camera by Nathan Boor of Aimed Research on June 3, 2013. Identification credit due to an anonymous comment on TheFirearmBlog.com article Aimed Research - Extreme High Speed Video (June 3, 2013 by Richard Johnson)
Free file sharing must have accompanied credit to author, Nathan Boor of Aimed Research, on the internet page it appears.