People watching, in an academic way. For this discussion, you are being asked to

People watching, in an academic way.
For this discussion, you are being asked to people watch. Find a public space where there are people gathered. Please provide a brief explanation of who you are observing and where you are observing them. Do your best to observe carefully and ethically.
Describe the nonverbal behavior and then interpret the nonverbal behavior.
Voice/Paralanguage
Facial Expression or Eyes
Posture or Movement
Personal Space (proxemics)
Artifacts
[Any additional nonverbal behavior you observe]
Finally, answer the following questions:
What do your observations and interpretations above tell us about the reliability of nonverbal channels?
What does this tell us about believability?
What guidelines would you suggest for increasing the effectiveness of nonverbal communication in various communication situations?