In a video recently discovered online by British private school students, teacher Sarah Green simulates sex with a construction worker.

"It's gonna get dirty," reads the tag line.

Such behavior should get her sacked, right?

Well, not exactly. The video is actually a short, funny commercial that demonstrates a line of clothing's safety features.

The promo was never shown on TV, but it did win a couple of prizes at the world's top advertising awards in 2005. And, unfortunately for Green, videos out in the public domain these days tend to make the rounds on the Internet. So when some of her students found the clip, their parents started raising questions about whether she's fit to teach them.

Green may be better off leaving the school, where she's probably wasting her talent. The video is excellent, and she's got an open invitation to our casting couch. Video after the jump.