Poena cullei was the extremely creative, yet brutal way of punishing people who committed parricid (i.e. killed their mother, father or both). The main idea was to throw the murderer into a sack with live animal (for example a snake, tiger and monkey) and throw them into a river. Naturally, the wild animals would panic and use their fangs, claws, mouths etc. to inflict major damage onto the poor human inside. Not a nice way to go.
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