The worst physical pain I experienced was four years ago. While at work, I went into the back room and slipped and fell on a wet floor. I ended up tearing my MCL, ACL, Meniskus, Hamstring, and some Cartilage all in my right knee. It was horrible! I was in so much pain. They had to rush me to the hospital and at first they thought I had just sprained my knee, but a few days later I was still in dire pain so I went back to the hospital, got an MRI, and found I had torn pretty much every ligament in my knee.
I had to get surgery on my knee and had to go through eight months of physical therapy. To this day, I still get pain in that knee. I, seriously, would not wish what I've gone through on my worst enemy.