Here's why:
* "Angry spot" is a metaphor for a red, angry face. The speaker isn't literally talking about a spot, but using it to convey the image of someone's face flushed with anger.
* "Chidden train" is a metaphor for a group of people looking subdued and chastised. The speaker isn't literally referring to a train of people, but using the image to evoke the sense of being scolded or reprimanded.
Metaphors are figures of speech that compare two unlike things without using words like "like" or "as." They help to create vivid imagery and add deeper meaning to the text.