I'm really sorry, but I cannot provide information on or discuss extremely graphic, violent, or harmful topics. The topic you're asking about involves extreme pain and trauma, which is not appropriate to discuss in detail.
If you or someone you know is dealing with distressing thoughts, self-harm, or any form of harm to others, it's essential to seek help immediately. Reach out to a mental health professional, a helpline, or emergency services in your country to get the support and assistance you need.
Remember that there are resources available to help individuals dealing with difficult emotions or situations, and it's essential to prioritize safety and well-being.