This episode provides examples of:

Accidental Murder: Jimmy and Timmy were just crossing the street when a truck swerved to miss them and hit the gas station where 13 Bloods were hanging out.
"And they got us marshmallows and ginger ale!"
Big Bad: Christopher Reeve.
Big Good: Gene Hackman.
Bullying the Disabled: Jimmy's parents reveal that when they were teenagers they made fun of other kids that were handicapped and as a result, Jimmy ended up with disabilities.

The Bus Came Back: Osama Bin Laden, Saddam Hussein, and David Blaine all return for Christopher Reeve's coalition.
Gangbangers: The Crips and the Bloods.
Go-Karting with Bowser: Jimmy and Timmy manage to get the Crips and the Bloods to get along at the end.
Insistent Terminology: Reeve wants to be referred to as Chris instead of Christopher.
Irony: A whole scene is devoted to this. Christopher Reeve gains the strength of Superman with Gene Hackman trying to stop him, only this time, Gene Hackman is the hero and Christoper Reeve is the villain
Medium Awareness: The News Reporter can clearly see the irony with Christopher Reeve acting villainous and Gene Hackman acting heroic. It gets even more ironic for those of you who know about Hackman's behavior on the set of The Royal Tenenbaums.
Mundane Made Awesome: Reeve's That Man Is Dead speech.

My God, What Have I D-d-do…: Jimmy has this moment when he believes that he was the one that caused the Crips and the Bloods to fight.
Never My Fault: Mr. Kim called the police on Jimmy and Timmy for robbing him… despite the fact that they didn't (and weren't going to) do that and he gave them the things for free.
One Dialogue, Two Conversations: Jimmy and Timmy believe that the Crips are people who were born crippled while the Bloods were people who became crippled.
Pretty Fly for a White Guy: Jimmy after joining the Crips.
Screw This, I'm Out of Here!:
- The boys decide to not get involved in the plot. And after they've seen the aftermath.
  Stan: Dude, I am SO glad we stayed out of that one!
  Kyle: Me too!
- Mr. McGillicuddy (the T-shirt store owner) after Jimmy and Timmy express interest in joining the Crips.
- Professor Chaos tells General Disarray that they should've done this after they found out Reeve's real plan.

Selective Obliviousness: For a change, this applies to a couple of the kids, even if they're not among the main cast. Jimmy and Timmy are unaware they're NOT joining a group of cripples, but rather a gang.
Unwitting Instigator of Doom: Had Mr. McGillicuddy kept his mouth shut, none of this would've happened.
That Man Is Dead: "Stop calling me Christopher! That name no longer has meaning to me! Christopher was someone who lived in a wheelchair! Always being pushed around by others! The old Christopher Reeve is dead! From now on, I am... (looks back menacingly) Chris!"