I had it after a knock to the nads playing rugby. Sore the next day, developing into excruciating pain, bent double gasping for breath and sweating in the end. Spewing up. Phoned ambulance. They said a taxi would be quicker. Amb rang ahead to the hospital and they were waiting for me outside with a doctor, a nurse and a stretcher. Put me on it, shoved painkillers up my hoop and I was in surgery within the hour. Untwisted it and put a stitch in to prevent recurrence. Day in hosp and then released with my knackers wrapped in one of those bags you put washing powder tablets.