I heard a story about my father once... one morning he awoke with an incredible pain, so he went to the hospital ASAP... by the time he got there, the pain was so unbearable that he was crawling on his hands and knees... he'd also called my mom for help, and she got to the hospital right when he did... as he crawled in through the door whimpering, the nurse took one look at him and proclaimed "Kidney Stones!"
She was right