Halo 2 trickster extraordinaire Vernon "vshields ash" Shields has spent an enormous amount of time-- literally hundreds of hours-- exploring the depths of the infinite enemies scenario at the end of the level Regret, to try and see if anything different happens. So far, he's seen quite a bit. Through object overload, he's made Regret disappear (as well as other enemies, visual effects, and bits of furniture) as well as made over a hundred of the Prophet's chairs appear out of thin air.

M0N3y 5H07 posted in the Bungie.net forum that he found the "Hi Ben" easter egg on Regret referred to by Frankie in the abandoned tower. Other users captured videos: RapidShare, Putfile. Frankie was expected to give the solution in this week's What's Update.

..but not ride the elevator. Dark Helmet finds a way to get outside the underwater elevator in Regret.