Dawn's getting a blank stare that seems to last a stupidly long chunk of time before Troy's suddenly bursting out with, "BUFFY!" It's like he as ADD or something, really. "Dude, I totally used to watch that! She was so hot. But then I had school and homework and practice and just like, no time to watch the newer series stuff sooo..."
Oh, hey, he got distracted from the point for a second there, and it's only now that he's paused again to think on the situation that he can start realizing a few things. "High School Musical? That sounds... weird."