Hello! I am currently stuck in northern California without a mechanic to work on the Opel, thought somebody here may be able to offer some much needed help! What happened was this, GT had been sitting for a couple weeks with the parking brake engaged and in reverse/park. I pulled it out of the garage and drove it a couple blocks to see how it was doing, all seemed perfectly fine. I stopped, parked, and got out for a few minutes, and when I jumped back in to continue the drive the brakes had locked up. My first thought was the e-brake, however I soon realized that the cable was not stuck and I could roll backwards with some difficulty and still stop the car with the e-brake. With that out of the question I jacked up the front two wheels and found that both discs were still unlocked and rolling freely. Since I could roll backwards but not forwards I deemed the problem to be the rear drum brakes. Does anybody have any idea why they would suddenly lock up like this? I cannot get them disengaged by simply rocking the car and would burn the clutch up if I tried forcing it. I do not have access to any tools since I'm away from the house in southern California or else I would have tried my hand at looking at the assembly. Any immediate thoughts on what it could be? Thank you in advance for any help, I appreciate it!