Meaning: The boy's mind started to create all sorts of scary images.
Choice of Words: Imagination, ran, wild, inside are all nouns that describe the boy's thoughts. "Ran wild" is a verb phrase that means to become uncontrolled.
Alternative Expressions
Imagination galloped unrestrained within.
Meaning: This means that someone's mind was filled with many different thoughts and ideas that were not controlled or limited.
Choice of Words:Imagination is a noun that refers to the ability to create mental images and thoughts. Galloped is a verb that means to run quickly like a horse. Unrestrained is an adjective that means not controlled or limited. Within is an adverb that means inside something. When you put them together, "Imagination galloped unrestrained within" means that someone's imagination was very active and uncontrolled within their mind.
Thoughts raced freely through the mind.
Meaning: This means that someone's mind was filled with many different thoughts and ideas that were not controlled or limited.
Choice of Words:Thoughts are ideas or opinions that are formed in the mind. Raced is a verb that means to move very quickly. Freely is an adverb that means without limits or restrictions. Through is a preposition that means passing from one place to another. Mind is a noun that refers to the part of a person that thinks and feels. When you put them together, "Thoughts raced freely through the mind" means that someone's thoughts were moving very quickly and without limits or restrictions within their mind.