A childhood belief about excursions

When my brother and I were small, my family often took car trips along a highway that went past a prison surrounded by three curving chain link fences with barbed wire at the top. My brother was kind of a problem child, so when he asked what the prison was, my parents told him it was the "bad boy school" and that he'd have to go there someday if he didn't learn to behave. After thinking seriously about this for a few minutes, my brother declared that if they sent him there, he'd just make sure he was really big when he grew up so he could walk over the fences and escape.