Just about all of the anime episode "John Peach: The Seventh Team Member?". Sure it's a Filler episode, it's still one of the funniest of the earily series. John Peach, a loudmouthed boy claiming himself to be a hero (after a few misadventures) challenges Ginta to a few silly compatitions, like a race.
Koyuki (to Mrs. Torimizu): Did you know your son is a pervert? Made all the funnier by the fact that he really isn't.