Frequently Asked Questions
Hanna is based on a speculative story and script written by Seth Lochhead and later revised by English writer and director David Farr.
At one point during the final chase scene, you see Hanna (Saoirse Ronan) lean down and snatch a length of bungee cord from one of the rides. She uses this to launch the arrow.
It was part of their plan. Erik (Eric Bana) trained Hanna specifically for the task of being captured in order to kill Marissa (Cate Blanchett) on the inside and then escape to meet up with him later at Grimm's house. The switch allowed Marissa's team to find them (when Hanna was ready) and take her back to their base.
Yes, all of the songs are heard at various times throughout the movie.