Yes, she was trying to sneak up on him, hehe. It worked! ... oh, was he mad at her? She suddenly felt apologetic and embarrassed. He might have been handling some important prefect business and did not want to be disturbed. Or he might have been in a bad mood, which could have been made worse because of her. She knew that her specialty was unintentionally annoying someone when they are already feeling irritated.

"Nothing, haha. Did I scare you? Sorry," she said quickly and stepped back a bit. He looked kinda amused though? So she smiled and looked inside the broom cupboard herself. There were brooms and other boring things - nothing exciting. "What were you doing here?"