A somewhat strict enrage timer in its original form, but not as bad on DPS as Saurfang I would say. The fight is consists of professor putricide throwing goos from the balcony while you fight a juiced up version of normal Festergut -- overall quite fun. Make sure you see that pro deterrence in the end!
According to wowprogress, we killed it on "Feb 10, 2010 21:32" and obtained a world fifth, US third rank after 30 minutes of attempts. Enjoy.