What does the phrase The brows become flying birds of astonishment mean?

"The brows become flying birds of astonishment" is a poetic expression that describes a person's eyebrows arching in surprise, resembling two small birds taking flight. This phrase vividly captures the physical manifestation of astonishment, suggesting that the person's eyebrows are so elevated and expressive that they seem to have transformed into live creatures. It portrays a sense of wonder, disbelief, or awe so intense that the eyebrows take on a life of their own. This phrase adds an element of whimsy and creativity to the description of astonishment and highlights the imaginative ways language can be used to convey emotions.