The worst physical pain that I have actually experieced is going through a surgery on my head without any sort of numbness. The shot didn't numb the intended area of my head (i was getting some growth that could become cancerous removed and it was like, in my fucking skull), and they had to cut out this bitch with a scalpel. I was trying to scream, but the shot did make my cheeks tongue and jaw numb and I couldn't formulate any audible noises. Needless to say, it was fucking excruciating.