Like notaries, witnesses aren't generally required in order for a contract to be legally enforceable. However, each state may require special kinds of contracts (e.g., real estate deals, wills, and marriage agreements) to be witnessed by a third party in order to be binding.
McDonald's, apparently, use red and yellow because red=fast and yellow=hunger (hence fast food!). Remember also that meaning is what we create. It does not exist in the color itself and individual meanings may or may not exist in different cultures and individuals.
FAST (stroke) FAST is an acronym used as a mnemonic to help detect and enhance responsiveness to stroke victim needs. The acronym stands for Facial drooping, Arm weakness, Speech difficulties and Time to call emergency services. Facial drooping: A section of the face, usually only on one side, that is drooping and hard to move.