Rose was studying the students, wondering what type of person decides to learn theoretical physics, when she was startled by the stranger popping up from behind the desk. Wait, no, not a stranger. Just strange. That was the Doctor who had been hiding under his desk for reasons known only to himself.
She laughed a little under her breath. He seemed a bit of an absent-minded professor this time. And English again. Or perhaps English still was more accurate, because the last Doctor that she'd known was not the last one that he'd been. God, this one looked so young. She had noticed that already on the network, but a photo couldn't capture his awkwardness. Tall and gangly, like a colt, wearing trousers that were a touch too short and a bowtie of all things. Really, he was dressed like a man thrice his apparent age. Or like a hipster; she couldn't decide which.
Oh. And now he'd just pointed her out. Rose fought the urge to slump down in her seat as people turned to look at her. She wasn't used to attracting any sort of attention here, where she was just another lost soul searching for a second chance, and she could feel the heat rise to her cheeks, blushing something terrible. Still, she smiled and waved back because how could she not in the face of his enthusiasm? It would be like refusing to play with a puppy when he dropped a ball at your feet.
Still, she was thankful when the Doctor turned his attention to the blackboard and took the class's scrutiny with him. She flipped up her jacket collar to hide her face, knowing her focus would be on the lecturer more than the lecture and not wanting to invite any more speculation than she already had.