Worst Grade You Had On School

Post the worst grade you had on school tests. What is that grade, in which lesson(s) and when did you achieve these? I remember, in literature, a 9/20 (in a 20-grade scale), on finals, 3 years ago. But that didn't mind me, because I passed in that lesson with a 16, 17 and 15 in the three semesters (Greece has 3 semesters of 3 months each), and I have to write at least 6/20. Not to mention, I hate literature. Post your experience. You may use either a 20-grade scale or a 100-grade one.