According to Matthew Dicks , the most powerful stories are built on small, sudden transformations.
Dr. Grant decides to protect the children instead of avoiding them. An insecure girl realizes she can be a hero for her family. Raiders of the Lost Ark 5 seconds
To make the moment hit hard, start your story in a state opposite to how it ends (e.g., start with doubt if it ends in confidence). According to Matthew Dicks , the most powerful