How does Christopher Buckley use imagery in Thank You for Smoking?

Imagery:

"Nick could almost see the thought bubble rising above BR's head."

"He looked up from his dissimulations to see Jeannette's head sticking out from behind the door. She looked much more relaxed than she usually did ... Nick had to admit that Jeannette looked mighty fine this afternoon.

"Nick slowly rotated and found himself facing Lorne Lutch himself. He was still recognizable as the Tumbleweed Man, even fifty pounds lighter and with yellow skin. He was in a bathrobe and slippers and wouldn't have looked at all threatening without the shotgun that was aimed at Nick's stomach."