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Ever get the feeling a meal might repeat on you? Well, researchers at Nagasaki University have discovered perhaps the most extreme example of that ever documented: a Japanese eel that can escape from the stomach of a predatory fish via its gills.

Footage released by researchers Yuha Hasegawa and Yuuki Kawabata shows a fish in a tank as the eel is seen escaping from the side of its body.

The researchers used an X-ray video system to capture the scene as part of their study.

“Surprisingly, after being swallowed, most individuals attempted to escape by going back up the digestive tract towards the esophagus and gill, and some of them succeeded in escaping via the predator