The Ending Of Mark

Well after finishing the excellent book of Mark in great detail, I'm pretty dissapointed that we don't know what was really the end of Mark. I haven't really discussed this ending anywhere else probably cause the church kind of hides this, not exactly Sunday School material. Right now to me the longer ending sounds quite foolish cause of the drastic change in the way it was written. So I'm actually stuck between Mark 16:8 is the intended ending and that we can't find the real ending, which is diffucult to determine. Is it out of the question that Mark himself never finished the book? Maybe he didn't know how to end it, so handed in the manuscript as is? Is this out of the question? If anyone else has an idea of their own put it forward to me; I'd love to hear it.