An "event", possibly an impact during the full Lunar Eclipse February 20, 2008 (Feb 21, 03:19:57.4UT).
The event lasted 3 video fields. However, it does display some artifacting although the light levels
during the eclipse were different than what is typically the case with the shadowed lunar surface.
It is not similar to a cosmic ray event and I was using a focal reducer at the time.