Today, while stopped in traffic south bound on NW 185th in Hillsboro, I heard this sustained honk from a an obviously small car. It wasn't behind me (huge truck), so I was watching the NB traffic pass me and then finally in my side mirror I see it.
RED smartie!

I waved out my window, but they were so far by then I don't know if the saw my acknowledgment! Hope he/she didn't think I was a snoot!
This is the first time where another smart was trying to get my attention instead of the other way around.

And also the first one I've seen in weeks.