Kenny's mom becomes pregnant, and gives birth to... another Kenny.

Cartman: You see? This is just what I've been talking about. I can't even relate to you guys anymore cause you're too immature.
Kyle: What?
Cartman: I've gotta start hanging out with friends a little more intelligent and understand politics and stuff. It's just that I'm on this level up here and all my friends are down here.
Kyle: You don't know what you're talking about fat ass.
Cartman: No no no, me nah (holds hand high) and you guys nah (holds hand low), maybe a little more down here. Screw you guys, I'm going home.

(Cartman is typing in a adult chat room)
Cartman: Hi everyone. I am a young boy looking for fun times with older male. I like to ... (gets responses) Oh, this one looks good. Hung Daddy. Hello Hung Daddy. (reads response aloud) 'Hi, I'm 8 and a half inches'. Damn, this guy is tiny. He must be a dwarf. (starts typing) Sorry, I'm not interested in being friends with midgets. Midgets piss me off. Frowny face.

Mr. Garrison: I'm telling you, this is all a terrible mistake, Officer Barbrady.
Officer Barbrady: Well, the FBI said I have to hold you here, so that's what I'm gonna do, Mr. Complainy Pants.

Mrs. McCormick: Are you alright Stewart?
Mr. McCormick: Don't touch me. I've had my nuts broken, body poisoned and made love to in the ass by 3 dozen, 40 year old men. I just wanna go home and take a hot bath.

Stuart is hauled off in a SOUTH PARK HOSPITAL ambulance, but is taken to Hell's Pass Hospital.

The "Investigative Reports" board game cover misspells Bill Kurtis' name as "Bill Curtis."

Throughout the episode, Kenny's mom's T-shirt changes. In most scenes, it reads, "God Bless America," and has the American flag on it; in other scenes, it's an "I'm With Stupid" T-shirt; in the sequence where the McCormicks go on The John Denver Experience, Kenny's mom's T-shirt is solid green with nothing on it.

How did "Tony316" (the creepy guy at Mel's Buffet) know Cartman's real name (and not his Internet handle, BigBoned)? He never gave it to him during their Internet chat.

Cartman: It's "Investigative Reports with Bill Kurtis" fun-time game. You have to decide if you deny it or cover it up.

Investigative Reports is a documentary show based on real news items. It stars Bill Kurtis as the host.

Man: We are NAMBLA, the North American Man Boy Love Association.

NAMBLA (The North American Man/Boy Love Association) is a real organization that seeks to decriminalize consensual sex between adult men and minor boys.

TV Announcer: Hey, are you feeling down? You need some excitement. And North Park Funland has just opened its newest ride! The John Denver Experience! You'll be 'rocky mountain high' with this, the most EXTREME, INSANE RIDE EVER BUILT!

John Denver was a singer/songwriter known for his hit songs in the 1970s like "Annie's Song," and "Rocky Mountain High." He died in 1997 in a plane crash.

Dr. Mephesto: We're the North American Marlon Brando Look-Alikes.

Marlon Brando is an American actor known for being in films such as A Streetcar Named Desire (1951), and The Godfather (1972).

Visual: CIA Agents Donnelly and Bill Sphinx

The agents that arrest Tony are CIA Agents Donnelly and Bill Sphinx. They are the same CIA agents from episode "Starvin' Marvin in Space."