i just had a similar experience in miami. i had a rental jeep liberty driving down i95 at about 50. a guy in a sebring (???) convertable driving about 2 car length infront of me suddenly beared left to about 1/2 into the left lane, then turned right until he was horizontal againest the road. obviously i was braking but by now i was about a few feets infront of him but i was lucky that since he was horizontal againest the road he was moving into the right lane and finally hit the side railing as i pass by behind him. First time i have ever been even close to a accident. not the best start to a holiday