Halo 2 Easter Egg - "Hi Ben" Message

On the level 'Regret', as soon as you just go outside turn right. You will see a broken bridge leading to another temple. Go to the part with the gondola, face the temple you saw at the other end of the broken bridge, and gernade jump to the part closest to you.(if you are playing co-op jump on your partner then croutch-jump there). Then follow the catwalk to the right until you are in a dark room. From the entrance, turn left, and on one of the corners look at the ceiling and zoom to see a message saying "HI BEN".(easily done with sniper at max zoom, shine flashlight on it)