A team of biologists working on “Snake Island” in Macedonia discovered a centipede poking out of a viper’s body, which was its last meal.

The snake apparently ate the centipede, which then ate its way out of the snake from the inside. “The young snake gravely underestimated the size and strength of the centipede,” the scientists wrote in a resulting study. “We found that only the snake’s body wall remained—the entire volume of its body was occupied by the centipede.”

Although, the snake perhaps got the last laugh: they think the centipede may have eventually died from the snake’s venom anyway. Watch the gnarly video below: