Basically anytime Starkey and Darius get into it. This example from the second episode:
Starkey: You've actually stumbled on the entrance.
Darius: What do you mean, stumbled?
Starkey: You fell through a wall.
Darius: Pushed. Pushed through a wall, while searching.
Starkey: If you were searching, why'd you call for help?
Darius: ... It wasn't me.
Starkey: What do you mean, it wasn't you? There's no one else here!
Darius: I can't explain what you hear.
Starkey: Oh, so a sewer rat called for help?
Daruis: I dunno. Was its' name Starkey?
Starkey winding up Thorne during a Department open Day.
Thorne: Before we begin, let me run through a few rules. There will be no stragglers. There will be no questions during the tour...
Starkey: Can we ask questions after the tour?
Thorne: I said no questions.
Starkey: Does this count as a question?
Thorne: ...grow up, Starkey.