I have two theories, either of which might be true. I was startled by the sudden appearance of the headlights closing so rapidly behind me. I don't think the vehicle had been there. So, either the eastbound vehicle moved from the center lane into the right lane, or the vehicle entered the freeway at Harbor Blvd. eastbound onramp. It appears as if I was struck right of center, so vehicle may have been moving into the freeway's new right lane (Harbor onbound; Jefferson exit), and would have succeeded if it had been going 80 mph, but couldn't execute at 90-100+ mph. My car's final freeway resting place was here (38.574937°, -121.539045°).