What to events happened as a flashback before brock leaves the dome?

Before Brock leaves the dome, a series of flashbacks reveal his struggles with isolation and the emotional toll of his confinement. He recalls pivotal moments, such as the heart-wrenching farewell with his family and the intense training sessions that prepared him for life outside. Additionally, he remembers the friendships he forged with fellow participants, highlighting the bonds formed in their shared adversity. These memories underscore his internal conflict and desire for freedom despite the risks ahead.