We don't know where to begin.

So ...

This afternoon, US Airways tweeted a reply to a customer.

It was all business as usual, until you looked at the attached photo:

We blurred out the photo because it's not appropriate for work — or anywhere else.

Here is the original VERY NSFW image. Click at your own risk.

The photo shows a completely nude woman on her back with a plane inserted into her vagina.

The tweet was in the US Airways Twitter feed for about an hour.

A representative for US Airways sent the following email to Business Insider:

We apologize for the inappropriate image we recently shared in a Twitter response. Our investigation has determined that the image was initially posted to our Twitter feed by another user. We captured the tweet to flag it as inappropriate. Unfortunately the image was inadvertently included in a response to a customer. We immediately realized the error and removed our tweet. We deeply regret the mistake and we are currently reviewing our processes to prevent such errors in the future.

They have since tweeted an apology as well: