For all Halo 1 fans out there (who isn't?), there's a thread in the Halo 1 tricking section about
reaching the bottom of the 2nd Halo map (Frogblast got us to the bottom of the 1st map, remember?). This is one of the last remaining places that I KNOW is still untouched today. I've personally spent a good deal of time trying to figure this one out, and I'd just love to see someone do it. Drop by and add your ideas.
PS - No, I've not dropped off the face of the earth, and just to put this one to rest - the chicken farm was a joke. Really.