visit your localup local hyundai dealers today. >>> now an 8 on your side medical alert on first at 4:00. how's this for a unique way of dislodging painful kidney stones. ride a roller coaster. >> a urologist in michigan became intrigued by the idea when several patients returned from vacations to theme parks. they said they were able to pass kid know stones being jostled around on roller coasters. the doctor tested the theory and found sitting in the back of the coaster worked best. passing stones more than 60% of the time. >>> and a new device is helping breast cancer patients right here in the bay area. >> it's designed to make removing breast cancer tumors easier, less painful, and less expensive. >> reporter: surgeons in a device that can allow surgeons are remove the effected tissue. i talked one on one with patient joyce moments before she had her tumor removed. leading up to the surgery. she was injected with a small rice sized ultrasound technology that allows doctors to pinpoint where lesions are located. >> you can actually see on the probe numbers so you know how clos the