Oh yeah, now I remember the episode with Bart and the mob. At the end they made a TV special out of it :

Gunshot: The Bart Simpson Story...


Bart: Alright skinner, tell me where the money is!
Principal Skinner: Never! *spits in Bart's face*
Bart: A wise guy, eh?
Fat Tony: Don't do it Bart!
Bart: *slaps and shoots gun at skinner*
_________________

real Bart: Cool!
Homer: When do we get the money for this thing?
Marge: The studio said they changed the story enough not to have to pay us.
Homer: *moans* (or he say's d'oh, I can't really remember)