Hey Ownedcore!
Back here tonight with another exploration. I searched "Explore" "Explore Shadowfang Keep" "Silverpine Instanced" and found nothing on this particular way out.
As far as I know, this is the only way out at the moment, since Blizz fixed the way out where you could fall out from the broken tower. (I found lots of posts on that one)
Difficulty: Easy
Here we go!
Start where you first emerge out from the Chapel past Commander Springvale. The ledge is to the right. You can either run or jump towards the ledge and land on it.
Next, you have to run along the ledge. Be cautious when running into the window, you could hook yourself onto it and fall off.
Once you reach the corner, it looks as if you are almost about to fall off. Position yourself so you can run forward, and you should run onto the next part of the ledge.
Keep running along the ledge until you reach the end of it.
This is the important part, you must mount up and position yourself to run and jump towards the mountain side that is in the red box. If you don't mount and jump, you won't make it and get ported out. You need to be full health as well, unless you are a rogue, or you will probably die.
Regain your health, fall down a few more times into the ocean. Avoid areas in the green line area. You risk getting teleported out.
I had my graphics down to low at the time, so I was kind of in for a nasty surprise when I saw it was like the Cataclysm Silverpine Forest. I was hoping for the old school Greymane Wall and such. I don't believe this method was possible because you never used to be able to mount in Shadowfang Keep (to my knowledge) before Cataclysm.
Just some notes. You can go into the village below, but there are some areas that will teleport you out. There are some cool areas in Gilneas and closer to Undercity where there are floating fishies and stuff.
To get back: Simply run back up towards the instance. You will be ported out.
Have fun exploring! More hopefully later.
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Added a video! Sorry for the quality, as I was messing around with my Mac WoW client's built in game recording. I think I fixed how the quality is for future videos (hopefully!).
Be sure to visit my channel at http://www.youtube.com/user/Teryaki11/videos. More will be uploaded soon!