OK - I lived "the dream" - two of them! First - Winter quarter 1984, I think. Had a "Man and Machine" class or some-such from ESM. No textbook, had to copy text from overhead, lots of reading, not interesting at all, elective. After a week or two, I decided to bail on it. Dropped (My AE advisor snorted and laughed and said to me and another professor, "It's just a damn ESM class! Drop it!"). Fast forward to spring break and my grades arrive in the mail - F! Otherwise, my best quarter ever. Fortunately, I was a pack-rat, and only 100 miles from school. The next day I drove back to campus and took my drop receipt to the Registrar office and got it all cleared up. If not for that slip of paper tucked away in a mound of other papers, I would have been hosed.
Second - I had statics with Dr. Chen (The Bamboo Shaft -
http://thecardboard.org/board/index.php?topic=11063.25;imode). A short way into the quarter, he had to do some travel, and he was replaced by a rotating cast of other characters like him. For some reason, statics was just not clicking. I think I forgot my calculator for the "gimme" test that was "do you know how to use a calculator" Anyway, he got back and finals rolled around, and I was nursing a C. I got up on the day and rolled over to the test a few minutes early - 11:00 am timeslot, I think. Something was odd - there were already a few people there, and they were all working furiously, and turning in papers! It finally hit me that it was the end of the exam, and I was almost 3 hours late! The TA grabbed the papers and started to leave, and I stopped him and explained how I was late. He was all like "Too bad, I'm out, dude." He did say he was going to Chen's office, and I could tag along and plead my case. Chen was bemused and had a laugh in a kind of "don't sweat the small stuff" way. He said it was no big deal, and that there was a letter-grade curve up. He took out the grade book, looked me up, and said "You have C, so you get B!", and then wrote down 'A'! I just kept quiet - I did not want to upset the goodness that was happening. He looked at it, then at me and said "You try to trick me!", and laughed, and changed it to 'B' I thanked him profusely, and got out. I dated a girl the next year who was in the same class at a different time - she went into the final with an A and came out with a C. FWIW, I was 3 hours early to my Circuits final two days later....