I saw a dump truck almost run into the back of a semi at full speed on the highway on the way to work. The dump truck driver slammed on the brakes and swerved onto the exit ramp at the last instant. I had already merged to get off; but fortunately, I was far enough back to avoid getting run over. I had to brake hard so, I don’t think he saw me and the other vehicles in the exit lane. Or, possibly, he just decided to run us all over since the outcome would be better for him. Then, after almost causing a chain reaction accident, he just got back into the left lane and went on!