We can't forget the scene when Kaneda and his pals were at the police station. It opens with an Officer looking through files with a picture of Kaneda looking angry like he usually does. Then he put the file down and Kaneda, right in front of him has a goofy smile on his face. Then we see this exchange:
Officer A: All right, the story is,you and your friends went out at night on your bikes to visit your dying mother. Another bunch of biker hooligans, called the Clowns, attacked you. They hurt your friend,you lost your temper, and that's why eight of these Clowns are now in the hospital. (Officer B looks through files of recently brought criminals and a picture of Kei appears on his current page. Kaneda looks over at that picture)
Kaneda: Wowee! She's sure hot.
Officer B: Hey! This is confidential! (Kaneda chuckles, going back to his seat)
Officer A: And how's your mother doing?
Kaneda: Fortunately the worst is over. She cleared the hump.
Officer A: She cleared the hump, huh? What's next, a triathlon?
(Kaneda and a few of his friends laugh)