What you are usually looking at when you are trying to write, or what your mind can feel like in the middle of an exam. Perhaps the leading cause of writer's block.

In some British GCSE examinations, you will find this inexplicably scrawled across an otherwise blank page in Times New Roman...

BLANK PAGE

Aside from the interesting philosophical questions that this seemingly random statement produces (How can a page be blank if it has "BLANK PAGE" across it? Why would it need to identify itself as such?) there is a reason. Before the exam boards (AQA, OCR and MSexcelEdExcel) introduced this notice, there were just blank A4 sheets with nothing on them dotted around the papers. Obviously, some students panicked because they thought a page had been dropped unintentionally. So to assuage such fears, the boards put this oxymoronic statement on each blank page.