Final answer:
In "The Book Thief," Part 5, Hitler shouts "Heil Hitler!" to the audience watching the imaginary fight.
Step-by-step explanation:
In "The Book Thief," Part 5, Hitler shouts "Heil Hitler!" to the audience watching the imaginary fight. This phrase was commonly used as a greeting and salute in Nazi Germany, and it became closely associated with Adolf Hitler and the Nazi movement. It was used to show loyalty and devotion to Hitler and the Nazi party.