His eyes fell to the floor. She screwed up her face. He ran through the door. She strained her eyes through the viewscreen. Be careful about capitalizing words in order to indicate their importance.
Several problems attend rampant capitalization.
First, extraneous capitalization tries and fails to conceal a lack of intensity, style, substance, or all those qualities, in your prose. Second, if you capitalize Many of the Nouns in your Sentences, your Prose your Wish a Story in German to write will read. Third, when you sell your novel, the cover blurb will contain every single word you've capitalized. You get my drift. It looks dumb.