Quick reminder, there are many different versions of this story, so always have your ears and eyes ready to observe!
From what I have learned, Zeus chained Prometheus to a mountain where a hawk would eat out his liver every single day. Since Prometheus was a titan, his body parts would grow back the next day and the cycle would repeat.
I believe the answer you are looking for is: "a violent or destructive protest." The government would be most likely to become involved in a union protest that is violent or destructive.
