I had one last year. Got stuck at the final turn into my bladder. I had cat scans, x-rays with dye, and ultrasound to find/size/track my stone. Finally after three months of suffering I begged my urologist to take it out. I had to have surgery to remove my stone. Nothing in the world has ever made me pass out from pain, but that first pee after the surgery...wow. Thank God for the large orderly standing there to catch me.