From what we can tell at this point, the belts broke. The tech had suggested it could have been a vehicle with a high luggage rack or truck with a headache rack that could have caught on it, but when I went back and watched the video, it appeared that the bridge performed the 1st presoak/bug pass on the front of the vehicle, moved to the back of the vehicle and stopped because the belts broke at that point. So that means the top brush never came down on the vehicle yet. Could have been bad belts, but they'll look to warranty them with WW. Probably 1 belt broke and then the tension from the brush coming down broke the other one.