"He almost jumped out of his skin when the screen door above him was flung open, its flimsy frame clattering like a firecracker against the outside wall. Mira came thundering down the steps towards him with a broom above her head, her face contorted with rage." ("Watercolours")
(almost) jump out of one's skin / nearly jump out of one's skin (fig.) - to react strongly to shock or surprise
Oh! You really scared me. I nearly jumped out of my skin.
Bill was so startled he almost jumped out of his skin. (McGraw-Hill Dictionary of American Idioms and Phrasal Verbs)
"The world was a fantastic, marvelous, awesome place, Rose decided."