Whats with harry and voldemort jumping off that bridge in the trailer for Deathly Hallows part 2?

That was most definetly not in the book. They probably added it to help make it more dramatic and to have more action in the film.Whats with harry and voldemort jumping off that bridge in the trailer for Deathly Hallows part 2?
i wish i remembered if that was in the book but i don't rememeber

i remember everything else but the thing is i don't remember exactly all the parts of the book

i read the book years agoWhats with harry and voldemort jumping off that bridge in the trailer for Deathly Hallows part 2?
It's probably mainly for effect within the movie... from what I hear, this will be the closest book-movie following of all 8 of them. So don't expect too many differences between the book and movie on this one.Whats with harry and voldemort jumping off that bridge in the trailer for Deathly Hallows part 2?
Voldemort died but that unicorn thing comes and saves hairy.

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