Definition: Something that grabs your attention, especially an image or written description in a book
Example: The novel’s main character, Harry the two-headed chimp, really jumped off the page.
Iddy couldn’t find anything to enrich the explanation of ‘jump off the page‘, not even how long it has been in use. The meaning is quite evident, that something striking on a printed page will engage your imagination and come alive.
In his illustration, Iddy’s just realised he didn’t check how high up that page was before he jumped from it. I suppose that introduces him to the ancient advice ‘Look before you leap’….