How does David Lubar use imagery in Hidden Talents?

Imagery:

"All I needed was handcuffs. If my wrists had been chained to the seat, the scene could have been taken straight from one of those movies where they show the bus bringing the new guy to the prison."

"I imagined dozens of kids locked in dungeons, dangling from chains while a huge, sweaty guy wearing a leather apron heated up torture tools."

"He smiled at me. It was one of the scariest expressions I'd ever seen."