You'll Never Be Able To Un-See This BART Sex Tape

There is no shortage of people-behaving-badly-on-the-subway videos. But this amateur sex tape shot on a San Francisco BART train might take the cake.

The video, which was reportedly uploaded to the Internet on Thursday, features a partially disrobed man and woman allegedly having sex in the back car of the train. The windows are dark, suggesting that the incident may have taken place during the train's ride through the transbay tube at night.

While the move may have worked in "Risky Business," all we can think about is how we're never wearing shorts on the subway again.

BART authorities responded quickly to the video, vowing to investigate the incident and prosecute those involved.

"Lewd activity is not only highly inappropriate on BART, it is illegal. It can and will get you banned from the entire system," BART spokeswoman Alicia Trost said to the San Jose Mercury News of Friday. "Do yourself and the families who ride BART a favor and keep it in the bedroom."

You can see the (WARNING: GRAPHIC, NSFW) infamous video here and let us know what you think in the comments section. (h/t SFist)