Well at least that part was pretty good. Was he imagining the girl holding up the sign?
{SPOILER}That's implied. She's this woman from the UK that he used to work with or something that he hates but apparently had some kind of relationship with years ago, and she ends up being hired as the production manager/whatever for his news show. At the end of the pilot, he confesses to her that he's not on vertigo meds that fucked with his head like he's been telling people, but he thought he saw her in the audience and it threw him off, making him go on the rant, then after he gets on the elevator, she pulls out a big notepad/book and opens it up showing all of those signs, revealing that it was actually her in the audience.