I once got zero, because the test was too easy (in first year of college, and it was easier than high school level test) and I was too lazy to write solutions. I was so bewildered when teacher wouldn't believe I calculated everything in mind and made me to repeat the test >_< teachers in first years of college are way harsher than they are in later years.. I remember submitting absolute mess of a test in 3d year, but since I was the only student writing that day, teacher started to check it right away, and I managed to get passing grade only because I was on site and explained him how I got the result (it was really hard to get through my messy writing, I didn't even had pencil and eraser, so I had multiple versions of messed up graphs everywhere)