This happened to me when I was taking a drive in the country recently. I was on a two lane road with a double yellow line. All of a sudden I get stuck behind a piece of farm equipment going 15mph. After about 20 minutes of going 15mph I saw that the hybrid battery indicator was about 2 bars from the bottom. I couldn't brake, and I couldn't speed up, but I started to get a little worried. Fortunately, the big green machine found a place to pull over and let all of the traffic behind it pass. Is there anything I could have done to keep the hybrid battery from going so low? What would have happened if I had continued driving like that? I'm quite certain that it would never happen again, but you never know! Well, I guess it could happen on the highway in a bumper to bumper traffic jam.