I had that happen to me in one of Ohio's many ice storms. 77 Dodge 4 x 4. I had stopped on a paved country road that had multiple cars off in the ditches on both sides of the road. I was talking to one of the drivers about the possibility of pulling him out. As we talked, I slid off the side sideways into the ditch due to the crown in the road. I was able to drive 100 ft forward and backward, but could not get turned out of the ditch. Walked home, went back in the afternoon when the sun had melted the ice, drove right out.