In the movie, not the book, during the Battle of Hogwarts, Harry and Voldemort's wands connected when Expelliarmus and Avada Kedavra were cast in order to kill one another.
It was stated in Goblet of Fire (both book and movie) that only wands with similar cores do this.
Harry was using Draco Malfoy's wand, which has a core of Unicorn hair, and Voldemort was using the Elder Wand, which has a core of Thestral Hair.
Did they simply do this for a more dramatic effect, or did I miss something?
I would also like to address the fact that during the Battle of Hogwarts, in the movie, Voldemort and Death Eaters were Apparating and Disapparating within Hogwarts.
Isn't it true, that no matter what the circumstances are, you cannot Apparate within Hogwarts (unless you're Dumbledore)?