I have a pretty funny story that sorta qualifies.
So one of my friends is a little thick headed when it came to anything and we had a midterm paper to write for English. I had the class like 4th period and my friend had the class for 6th (5th period is lunch). He didn't write his paper but was absent for most of the due week, so the number of school days you miss you get an extension to turn in the paper. I think the paper was due on a Friday and we got them back on Wednesday, which was also the number of due date for my friend. So I have my paper typed and graded and everything. My friend asks to see my paper to compare how he thinks he would do on his paper. I figured, he doesn't have any time to copy it and really can only compare it so I hand him my paper.
(Thursday)
Next day the teacher asks me to go outside to answer a few questions completely straight-faced, so I go outside thinking, "I haven't done anything to get me in trouble for quite a while. What could this be about?" so we're outside and he's holding what looks like the paper, shows it to me and asks me to explain. I look at it and put my hand over my mouth to keep myself from laughing too loud (other classes near us had their doors open). and told him, "that has got to be the stupidest thing I've ever seen in my life." Then my teacher started laughing; apparently he thought so too. Turns out my friend literally took a pencil crossed out my name, wrote his name above mine and turned it in. Mind you, the paper already had a big letter grade written on the front in red pen. I explain what happened and then he asked me for a favor: That when I see my friend, I was to pretend that nothing happened because my teacher was going to tell my friend that because of what happened both of us were going to receive a 0 for the paper because of cheating just to see his reaction. I agreed because I thought it was hilarious.
at lunch I saw my friend and didn't mention what happened at all. Just pretending that nothing happened, regular day. After school I saw him and he was about to cry and telling me he was sorry, I asked him 'Why?' and he told me the teacher was going to give us both 0s on the midterm and it was all his fault and I asked him, 'WHAT?' and he told me again and I said I would talk to the teacher on the next day and see if I can't get this fixed. All the while I was acting very irritated.
(Friday) morning
My friend is still apologizing to me saying he'll make it up to me somehow. I'm still acting a little annoyed with him but not trying to worry about it too much. I get to class and the teacher asks me to stay after a little into lunch and now the whole class thinks I'm in serious trouble. So after class He asked me how my friend responded and I told him that he's still really upset and regretting the whole thing. So my teacher says to tell my friend that I got in really big trouble, how cheating is a serious offense punishable by expulsion and that he wants to see me after school. And I'm just thinking, this is getting good and he tells me that he's going to tell my friend the same. So I get to lunch late just a look of shock and dread on my face and I tell my friend how I have to see the teacher after school and all of our other friends are freaking out because I'm the good student of the group and now my other friends are telling our one friend how he really screwed up big and he's feeling even worse. lunch ends, he goes to the class.
I want to know what happens so I asked my 7th period teacher if I could leave early because I have to report to another teacher and don't want to be late, then the best thing happens. Someone from my 4th period class volunteered information and told the teacher how I've been in trouble two days in a row. So now there are 2 classrooms of people who think I'm in big trouble. So the teacher agreed to let me out early because she didn't want to get me in more trouble and I got a hall pass and everything.
so school's out I go into the classroom while people are walking out and take a seat front and center and wait for my friend to show up. he sits down next to me and he's on the brink of crying anticipating the worst. The teacher walks up to us and starts talking about how cheating is bad and my friend starts crying and I just completely break character. I just start laughing and say, okay I think we're done here. Teacher explains what happened and my friend was mad because I didn't warn him and he punches my in the arm. I'm still laughing hold the part of my arm he punched and say, "You don't want to add fighting to your list of crimes, do you?" then my friend started laughing and finally cooled down. So our teacher told us what was actually going to happen: my friend got a 0, I got my grade, our teacher had no intention of actually expelling anyone and he was content getting a good laugh.