Jerry is the narrator

Narrator: Trainz was filmed in High Definition before a live studio audience.
Austin: *Passing door with a freight train* Since when?
Narrator: Okay, it's not really, but..
Audience: *Laughing*
Jerry: ..why am I even saying it then if it's not true?!
Sean: *Passes door with a passenger train* Nostalgia.
Audience: *Quietly laughing*
Jerry: Ah. Well, we're supposed to have yet another new engine on the line. Why am I not surprised?
Sean: *Passes door with another passenger train* Continuity.
Jerry: On what?
S.B: *Rises up from the ground* Merchandise.
Audience: *Laughing*
Jerry: Of course....