“Hit him again, Jack! He's crazy!”

“Jack's doctors have told him he is crazy… but, the truth is, it's the Voices who are crazy, not him.”

“He lunged for the maps. I grabbed the chair and hit him with it. He went down. I hit him again to make sure he stayed that way, stepped over him, and picked up the maps."I win.”

“(She) got herself a real boyfriend and she was just crazy about him. Not jack rabbit naked and coyote howling crazy, but sugar 'n' butter, soft 'n' sweet crazy.”

“Marvin started his ironical humming again. Zaphod hit him and he shut up.”

“George grimaced. “Jack is spoiled. Things are hard for him, but he isn’t the only one who doesn’t have it easy. He gets away with crazy things because he’s a changeling and he’s different. Jack could behave better, but he stopped trying. He decided that he’s worthless and that nothing he could do would make any difference.”