While driving my family to Sonic yesterday, I saw Khal pedalling up Diamond. I recognized him from a good 600 feet away based on--get this--his gait. I knew it had to be Khal based on his high, steady cadence. I felt like I should shoot him a friendly "hi", but how? Honking would probably be the worst thing to do. Yelling would be second worst (yelling at a cyclist from a car sounds a lot like "blaamafaafuh!" to the cyclist, regardless of what you yell).
Then it hit me, how about a shaka sign?
This means "hang loose" to most Americans, which at least when I was in a desert elementary school in the 80's vaguely meant "enjoy your physical activity". It doesn't demand the attention of the cyclist: either they see it or they don't. It makes the temporarily car-bound person feel like they're still in the cycling community--and let's face it, a high percentage of this town is in that community. Lastly, if someone else on the road sees it, it'll lower their blood pressure if it does anything.
Whaddya guys think?