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.
A Ring Around The Moon. The ring around the Moon is caused by the refraction of Moonlight (which of course is reflected sunlight) from ice crystals in the upper atmosphere. The shape of the ice crystals results in a focusing of the light into a ring.