Tonight I had just started my drive to the store and after a block I noticed that something seemed to be hesitating while I was accelerating from stop. I made a return home as I was only a block away. But before I could even make it that far I had to stop and check out the situation.At first I thought it was a flat tire, what I found was that my left side rear tire/wheel was not spinning at all. It was locked up and literally burning rubber. The problem only happened while in 'drive', neutral and reverse seemed to be fine. So I 'reversed' myself home. Luckily it was only one block. Any thoughts on what it might be? Its a front/disk-rear/drum setup. I had driven the car only about 4 hours earlier. Never had any brake related problems before.