Root canals

There's this girl in my British Literature and Philosophy class. She constantly feels the need to use large words but she uses them incorrectly. She speaks over other students when they are called on. She "answers" questions with totally irrelevant information 99% of the time she is called on; keep in mind she raises her hand to respond every time there is an opportunity to do so. She even responds to questions regarding text she hasn't read from the book she has yet to purchase. I've been trying to describe how annoying this person is to several friends but I can never quite describe it sufficiently until today. As I climbed out of the chair after getting a root canal this afternoon, it hit me. Annoying girl = Root Canal. Both are equally as annoying and unpleasant. Now thats saying something.