On the way home today, I wound up driving in front of a V6 PBM with tinted windows on south I-5 merging on to the east 78 in Oceanside/Carlsbad. He was behind me until just about College Blvd, when I had to exit. I tried to wave, but he moved by too quickly, so I couldn't tell if he saw.

Funny thing, I saw a white G8 heading west on the 78 right before Jefferson. Two random G8 sightings at the same time!