Pfft. One of the above. True fear is getting to the end of that damned Scantron and realizing that you must have missed a question because there are 50 questions, but your bubbles only go to 49 and you then have to re-run through the test to figure out where you messed up/skipped and erase the damned thing and re-fill it out while running out of time and hoping you erased good enough because that damned machine will freak if it even senses the faintest whiff of a mark on a bubble but you couldn't erase them any more because you only have a few minutes left. *deep breaths* I may or may not have experienced this a few times during my schooling days. -_-