Sometimes it's luck.

Monday: chem test. Didn't finish. Spent a bunch of time agonizing over one of the four-point multiple choice questions, wherein all answers seemed ludicrous, and lost track of the fact I had skipped over one of the longer nine-point show-work problems. Scribbled a pile of math for that one in the last three minutes of the exam. Time was called before I got to an answer.

Today: got test back. Was hoping everything else was correct, so that I'd get at worst an 87. I was stunned to see that I got a 99. The multiple choice NEARLY TOTAL GUESS turned out to be correct, and I lost only a point for not doing the last line or two of calculations in that one problem I had barely had time to set up.

Sometimes, I swear, it's just plain luck.