Edit: Do just as Scott said (while I was posting), and keep in mind what Greg says about tension built up in the top. /forums/images/graemlins/wink.gif
I would clean up the top first, keeping in mind that there are limbs that are stressed and holding up that end of the stem. With all the top cleaned up, then you will know where the load is, and will have eliminated the twist stress and those limbs that are now stressed. That will leave you free to work from the top end up the stem toward the broken section. As you go, cut a shallow cut on the top side of the horizontal stem, followed by a cut up from the bottom. Keep the cuts straight (level with the ground) and cut in short lengths (firewood length or two to three times that length). You will then just have little weight to deal with and find when you get to the standing portion of the trunk, it can be felled to one side or the other with a cut at the stump. I wouldn't get close to it with a loader, but only work from the 'top' down to the stump in small increments.
Be careful, and you should be fine. Safety wise, use chain saw chaps, hard hat, and ear plugs. Have a sharp chain.