From a detailed observation of the image provided:

1. **Eyes**: The eyes are wide open, with raised eyebrows. This often indicates surprise or alarm. The white sclera of the eyes is prominently visible, which reinforces this interpretation. The tension in the eyebrows could also suggest an element of anger or frustration.

2. **Mouth**: The mouth is open, showing teeth in a manner that doesn't resemble a natural smile or laugh. This could indicate aggression, especially when combined with the overall appearance of the face.

3. **Forehead and Brow**: There are visible creases and lines on the forehead, and the brow is furrowed. This generally indicates intense concentration or focus. The tension in the brow can also be a sign of frustration or anger.

4. **Face color**: The skin appears to be flushed. This can be an indication of strong emotions, such as anger, excitement, or physical exertion.

5. **Position in the Frame**: The individual seems to be peering or emerging from an opening or a break in a barrier. This suggests a sudden appearance or intrusion, further supporting the interpretation of surprise or alarm.

6. **Genuineness of Emotion**: Given the combined facial expressions, it does seem like the person is genuinely experiencing intense emotions. However, the dramatic nature of the expression (especially in the context of them appearing from a barrier) could suggest that this display is exaggerated or performed, possibly for the benefit of an audience or to convey a specific message to the viewers.

In conclusion, the person in the image appears to be experiencing a mix of surprise, aggression, and possibly anger. There's a heightened state of alertness or readiness. The exaggerated nature of the expression might mean that while these emotions are genuine, they are possibly amplified for effect or to convey a specific impression to others.