Many things that Professor K says are funny, but this has got to be the best one: "A letter from Mr. Osaka asks, 'How do I rid my house of these nasty roaches?' Easy, just burn your house down!"
Later on, Mr. Osaka responds saying, "I burned my house down, now what?" Professor K's answer: "How should I know, fool?!"
Beat's face and shrug when he sees that Potts is missing.
The fact that the cops are sending in tanks, tear gas, and air strikes all because of teens doing graffiti.
The noise Yoyo makes when he falls from a great height in JSRF.
"The name of this tower is—BLAH-DE-DEE-BLAH, ITS NAME IS IRRELEVANT!!!"
Professor K's description of the sewers in JSRF, comparing them to his ex-girlfriend.
You can make your own custom sprays. Bored players have probably abused this to spray phalluses all over Tokyo-to.
Roll through any crowd of people. There will be at least one woman (or 20) accusing the Rudie of "AGH, HE TOUCHED MY BUM!". Or alternately, 20 men screaming "MY KNEE, MY KNEE!".