Borderlands Easter Egg - Diablo II Reference

When searching for one of the hidden journals in the Rust Commons, when you are near the one found in a box near a camp of dead bandits a massive rakk called 'Rakkanishu' shows up and tries to kill you. Its name refers to a boss you have to defeat in Diablo 2 known as 'Rakanishu'. Also upon killing Rakkanishu, he drops a unique shield called 'Cracked Sash'. That is a very common item found in the areas of Rakanishu in Diablo 2.