(posted: 3/19/2010 7:23:30 AM) In one of the corners by the she of the windows is what i presume a broken window cleaning lift hanging flat against the wall by just 2 of the 4 cables that lift it you have to do a tricky jump onto it when you've achieved the marathon pro perk, then you run across the highrise platforms all the way up to the roof.If you haven't marathon pro don't try cause you'll fall into the abyss.