I have an oak tree that has blown down and been uprooted. Is there a relatively safe technique for removing it? My concern is that the root-ball (about 4 1/2 ft diameter) will naturally want to fall back into the hole. How can I let gravity take it's course without taking me with it in the process? Here are the approximate details of the tree: -60 ft - main trunk about 3 ft tall/ 28" diameter - 3 branch sections come off of the main trunk and are approx 16" each at the widest point - The tree is laying flat in an open field, and there are relatively few limbs along the trunk until rather far at the top--no serious springpoles that I can see. My plan is to limb it at the top and leave the bulk of the main trunks intact before worrying about separating it from the rootball. Any advice?