I found the video of the Gorilla Biscuits reunion show that happened Sunday (August 14, 2005) The picture quality is not great, but you can see the craziness. More importantly, you can listen to it. It sounds great.

NOTE: Its a yousendit link thing so it's gonna expire after people start downloading it. IF YOU DOWNLOAD IT, please re-upload it to yousendit.com and post the link in the comments. THANKS!

Yousend it link: Gorilla Biscuits Video (LINK UPDATED)