According to Getting to Maybe, there is an explanation why bombers pass and acers fail. The reason is because when your test was too easy, chances are that you didn't find everything and therefore can't put together an answer that the prof is looking for. However, when you find everything, you are likely overwhelmed and begin to toss up on a lot of things. Here, it is likely that you are hitting everything and the professor will be overjoyed that someone understands his complex and possibly misunderstood(though this could just be a hard science thing) mind. The point here is that unless you have exhausted yourself trying to find problems, you still have work to do. Exams should be stressful and that's why A-type personalities (from what I understand, those that are propelled by constant crises) excel at the study and practice of law. I think this is an explaination why some people who bombed and fall toward the bottom start to succed and top students begin to be in trouble is because students who are C+/120th in a 200 student class feel compelled to work harder while those who are B+/40th think they have mastered law school and can do anything they want.