Great thread, Stoo! I was getting ready to do a thread just like this when Rob linked me to this one. I've had Pedro in my all time top 10 heavyweights for years. Looks like most of the stuff I was going to post has already been included. Tommy put in the Abbott and Barnett videos. Rob put in the Arlovski gif.
This is the Severn ko: http://www.bebo.com/c/video?FlashBoxId=6293169660
Here is a the Arlovski replay just after the fight: http://vimeo.com/5994503
This is footage from the his first fight with Randy, a fight many thought that Rizzo won: http://mma-core.pl/?p=1753