I've been bent, folded, spindled and mutilated on more than a few occasions.
But a kidney stone, was about the worse pain I've ever had. Ditto on ending up in a ball on the bathroom floor. I got real shocky and things got dark a few times, I was probably drifting in and out a bit. Only time I've ever actually passed out from pain. Passed out form blood loss a couple of times, but not from pain.
The second stone, wasn't nearly as bad, guess it was smaller.
I started drinking a glass of Cranberry juice every morning, don't know if it helps or not, they say it does. I haven't had any stones in a decade or more now.
Got to say though, blood poisoning is a close second.