Exams, I just hate doing them... plus I usually finish about 20-25 minutes early, having looked through the paper several times to make sure i've answered everything I possibly can so then end up sitting there with time seemingly passing at half speed... Not allowed to leave, not allowed to turn around, just have to sit there facing the front looking at the clock.
And it's so fucking frustrating when you do loads of revision and work hard in class, only to get an exam which has very little related to the stuff in the exam board's very own textbook! AQA Biology Unit 4, you've probably seen the protests against it in the news, the Facebook group has nearly 13,000 members, and about 20,000 people took the exam.