<human>: I'm a high school history teacher and I had one particular student was just particularly hard to get along with. He was a distraction but nothing serious.

One test day he comes to me and says that he was checking out in an hour so he wouldn't be taking my test that day. I tell him no, he can start now, because every other student by that point had taken no more than about 30 minutes to take the test. He obviously just wasn't prepared and thought he could use his early leave as an excuse not to test.

I put him in the hall to test so he can start sooner than everyone else and he tests and takes the full 50 minutes or however long it was by that point. He's clearly mad as he turns in his test and leaves school. 

Next day I show him his grade and he immediately demands a retest because he claims he had to rush since he was checking out. This is obviously bullshit, this is late in the semester, I know his bullshit. I tell him I don't do retests. 

He threatens to get principals and/or parents involved, just being a pain in my ass. He even asks me just to raise his grade a few points to where it's a C... he wants me to just give him the points no questions asked. I tell him I'll make extra credit available for students who made below a C. Several questions that will add points onto the test score to raise them. He was the only person interested in attempting.

I made the extra credit questions so difficult and nit-picky that he only managed to get one question correct... raising his total score one point, still a D. It was the most satisfying thing I'd done in a while.

Summarize the given text in a few sentences.
<bot>: Student demands extra credit for a test they did tried to get out of, so I make the extra credit so hard they barely earn any extra points.