The film was based on the novel JUMPER by Steven Gould. We know that when a novel goes from the page to the screen, it is adapted and changed to fit that venue. In the case of the novel I'm giving away, just the opposite occurred. The author wrote another novel, based on the adapted version of his original book to the screen. I've never heard of such a thing, have you? If you have, please leave a comment telling me which book and film.
The blurb from the book, gives greater detail of the story:
The first time it happened, Griffin O'Conner was only five years old; he'd jumped from the steps of the Martyrs Memorial in Oxford, in front of a busload of torists. The next time, his family had to leave the United Kingdom forever.
I held up four fingers and ticked them off one by one. "Never jump where someone can see me. Never jump near home. Never jump to or from the same place twice. And never, never, ever jump unless I must-or unless you or Mum tell me to."