"The bungling KV Zürich Business School educator reportedly forgot to turn off the overhead projector as he surfed the adult material online.
As his students sat peacefully with their heads buried inside their books, he decided to take a sneak peek at several hardcore movies and pics of naked women with amputated limbs.
One kid took a picture of the incident and uploaded it online — and, unsurprisingly, it soon went viral.
"I am shocked," school director René Portenier told the newspaper 20 Minutes. "After the lesson the teacher immediately came to see me and admitted he'd watched porn films on a school computer. He was very embarrassed and couldn't tell me why he did it," Portenier added. The Local reports that the teacher has temporarily been allowed to continue in his role.