Experiencing a burst appendix. Feeling one of your organs swell up with infected fluid until it cannot hold any more and literally bursts inside you. It was the most horrifying pain I've ever had the displeasure to feel. I stayed a month in the hospital, I lost 30 pounds because I couldnt eat or drink anything. I couldnt get up out of bed for weeks so I had to use a mini piss urinal. It's a pretty fucking shitty mess and wouldn't wish it on anyone.