Agents with the Norfolk, Virginia Transportation Security Administration, or TSA, were in for a surprise last week after a passenger ran his cat through the checkpoint’s X-ray machine.

TSA spokeswoman Lisa Farbstein posted about the incident on Twitter on Friday.

“Just when you thought it was safe to take your pet on a trip… A traveler left their pet in their overnight bag at a @TSA checkpoint this morning at @NorfolkAirport,” Farbstein tweeted. “Attention pet owners: please do not send your pet through the X-ray unit. Catastrophic error!”

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A follower saw the spokesperson’s tweet and asked if the cat was okay, to which Farbstein replied, “Yes.”

Both the traveler and the cat were required to go through TSA screening in the proper manner after TSA agents viewed the X-ray image.

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He also tweeted a video posted to Instagram by the TSA on the proper way to travel with a pet through the TSA checkpoint, adding that travelers with cats can request to have it screened in a private room, should they the owner has an escapist on his hands.

The Instagram video begins with an image of the cat’s X-ray with the words “Don’t do this” below it.

It then shows a man taking his dog out of a pet carrier and walking through the TSA checkpoint.