I can't remember the worst pain I've ever had, which I take as a blessing. the most recent terrible pain I had was when I torqued my knee, specifically my MCL, in a warehouse accident. The pain is less memorable (though it certainly sucked at the time) - the biggest part of that memory is that sudden feeling of "I've made a TERRIBLE MISTAKE." I hate that feeling, that sinking feeling where whatever other emotion that had been going on - rage, happiness, sadness - falls out of your head, through your body, and out of your feet, replaced deep in your bowels with a feeling that I can only describe as the closest I've felt to sheer terror. What if this is where I die? Worse, what if this is where I am permanently disabled? (apologies to the permanently disabled, this is personal opinion of course)