In the third Harry Potter movie when Harry, Ron, and Hermoine are going to see Hagrid before Buckbeak is put to death, they run into Drako. Hermoine puts her wand to Drako's throat to hurt him(shes holding the wand with her right hand), then all of a sudden she punches him with her right hand and her wand has jumped to her left. I knew wands were magical but I didn't know they could do that!