According to online reports, a teacher from Japan inserted a USB drive into his computer, and was attempting to show his students some math models that he developed.
But the teacher put in the wrong USB. And when he loaded up a file - using a remote control - it played an intimate video that the teacher and his girlfriend recorded together.
The video was very graphic - and it played on a giant screen, for all his high school students to see.
And the nightmare GOT WORSE. As you can see in the video, the teacher was unable to shut off the video using the remote control. He had to run across the classroom, and manually stop the video on the computer.
Here is a link to the video - warning it is GRAPHIC: