Grumpy Ghosting
Taking a break from the Reach scene, Grumpy has posted a few threads in the Halo 2 Campaign forum on his awesome new method for "ghosting" through doors. In his first thread he bumps through a door on the Armory, and in his second thread he tackles a door on Cairo. He's emphasized that this is still a work in progress but what he's shown so far has been some pretty amazing stuff. Go check it out!

This was written up so well I just moved the thread. Nice. :)