I was driving home it was very foggy outside. I seen a bright light above my vehicle. I looked in rearview mirror but saw nothing. Nothing was in front of me either. My vehicle would not respond to anything I was trying to do. I tried to brake, nothing, I tried to steer, nothing. I was driving 25mph, my vehicle jumped to 45mph. I thought this was a UFO. I saw a sign ahead that indicated there was a 90 degree corner coming up. I still did not have control over my vehicle. My vehicle simply drove off the road into the ditch where I struck a sign, telephone pole, and a tree. When the vehicle was finally stopped the object was gone, and my vehicle was responding to me at last. I was able to turn off my vehicle as well as turn it back on and the lights worked also. I was confused, hurt, tramatized, and angry by this. I had a great deal of serious injuries all over my body by this experience. My vehicle was totaled.