On my way back from the dealership where I got my radio replaced and picked up my new sway bar, the interstate started to back up. So I slowed down carefully and then realized that traffic had almost stopped, so I got on the brakes. This 100yr old guy behind me in a Chevy 1500 that was probably as old as he was has the "Oh SNAP" look on his face and tries to jump into the left lane without hitting me. In the process of swerving, he takes another Tundra CrewCab into the median. Thankfully, both of the Tundra drivers involved were fine but I think the old guy is going to have to go home and change his Depends. This makes the 4th time that I've been rear-ended or nearly rear-ended in this truck... even after adding the 60' light bar under the tailgate.