So in the 2nd grade of middle school.our classes had computers with projectors and teachers would present on them. At that time I was still a beginner in programming and knew some basic cmd commands, so before our teacher had come to class I went to the computer desk, opened cmd and then executed this command “shutdown -s -t 36000” which basically shutdowns the pc after 36000 milliseconds and then the teacher came to class and started explaining us a new lesson on a power point and half way through the power point the pc suddenly shutdowns and the class got wild. and no one admitted who did it so all the teacher did is to say” who ever did it pls don’t do it again”. Like wow...😂😂😂