Hannah has three missed calls, and a voice mail message, all from Agent Booth, when she turns her phone back on after class. The message is a little ominious in its brevity -- Hey, kiddo, call me when you get this, okay? Whenever that is. Or maybe it's ominious in that for all he's clearly trying to sound light and neutral, Hannah can hear in Agent Booth's voice that whatever he wants her to call him about is going to fall into the category of Not Good.
She doesn't even bother going back to her room to drop her things, just calls him on her way to the Metro station. She's not surprised when he asks her to meet him, as soon as possible, though she is surprised when he asks her to come to his office. And while it's clear he doesn't want to talk about Whatever This Is over the phone, Hannah's starting to genuinely and truly worry.
The last time someone had news they didn't want to give her over the phone, it was that
Agent Booth was dead.
It takes an eternity to get to the Hoover Building, and another eternity to get through security even though they've been told to expect her and had she realized where she was coming she SO would have gone back to the dorm to dump her stupid bag.
Eventually someone shows up to escort her up to Agent Booth's office, and she doesn't know if he's an agent or what, because aside from confirming her identity and asking her to come with him, he doesn't say a damn word. Hannah doesn't know if that means he knows what she's there to talk about and it's so bad that he doesn't know what to say, or if he's assuming that she's some sort of suspect or something and therefore not worth talking to, or if he just has the social skills of a cactus.
"Your visitor's here, Booth," the man says, and leaves Hannah standing in the door to Agent Booth's office.