Everyone and Jason, in particular, I don't take any advice on this as abrasive. I don't want to get hurt. I work with wood for fun. So I appreciate the lessons that others have for me. You were exactly right. I cut through one side of the hinge before the other, so it makes sense that the tree went the way it did. This was because I didn't have a feel for where the saw was coming out the other side. I am wiser now! I brought up this thread for the safety of others who are in my situation and considering dropping a tree.
Mark
You can sometimes count every orange on a tree but never all the trees in a single orange. -A.K. Ramanujan