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A happy facial expression almost always includes some type of smile. When people are happy, their face is more relaxed and care-free. Sometimes you will even see a happy person shed a tear of joy.

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Confused facial expressions usually show the eyebrows and nose scrunched up. Sometimes when people are confused, they raise one of their eyebrows. In this picture, his arms are being raised in the air. I find that many people do that when they are so confused about something that it starts to frustrate them.

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When people are sad, their mouths form a frown and are sometimes crying. Sad faces usually look like they are drooping downwards. Sad people often put their heads down when speaking. It sometimes looks like they don't want to be seen.

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I find that when people are bored, the typically have a blank stare or emotionless look on their face. Sometimes you can also tell when people look bored when it looks like they are thinking about something completely different then what is going on in front of them. They are entirely uninterested. Boredom is also shown with body language because people who are bored are usually slouching.

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To be honest, I do not know how Michael Phelps was feeling in this picture. Even though I do not know what emotion he was experiencing that day, his facial expressions are giving off an angry vibe. His mouth looks like it's frowning and his forehead looks very tense which is typically a sign of anger.