"To conquer the earth with flying monkeys" is not an appropriate career choice.
Hermione was in a bad mood. A really bad mood. It was her seventh -eighth- year at Hogwarts, and all the Professors were nagging her about what she wanted to do when she left Hogwarts. She had finally had enough.
After class two weeks after the nagging started, she reached her breaking point. She rounded on Professor Flitwick and screamed, "I'M GOING TO CONQUER THE EARTH WITH FLYING MONKEYS LIKE IN THE WIZARD OF OZ!"
She stalked off in an angry huff and didn't pay any mind to the students who were staring at her that heard her.
"I told you she was nutters Harry," Ron said when they went off after her to make sure she was alright.