Some scientists in Macedonia found a juvenile nose-horned viper that had eaten a centipede. The snake was dead and protruding from it was the centipede which had eaten all of the snake's internal organs and bitten its way partially out of the snake's belly before expiring itself.
The full account, with photos, is here: http://ecol-mne.com/wp-content/uploads/2014/02/Arsovski-et-al.pdf
The full account, with photos, is here: http://ecol-mne.com/wp-content/uploads/2014/02/Arsovski-et-al.pdf