And this doesn't just happen at congested intersections, it happens everywhere. Now I complain when my brother pulls up practically on the bumper of the car in front at a light, but a couple feet is usually the norm. A car length and a half is STUPID!
Mood necklaces or rings usually contain a chemical that changes color with heat (example cold to warmer black, purple, blue, green, reddish). They then usually have a pamphlet saying what the colors mean.
The term blue moon doesn't actually refer to the color of the moon. It is an old way of noting the second full moon in a calendar month. This doesn't mean, though, that the moon is incapable of appearing bluish to us; dust particles in the Earth's atmosphere can cause this color effect.