The Mayo Clinic has developed a device that some Parkinson's patients say is helping them walk more easily. It's essentially a highly adjustable laser light. Most of us never give turning a corner a second thought, but diagnosed with Parkinson's Disease, it's often the first thing on Doug Merfeld's mind. Turns cause him to freeze. Movement disorders neurologist, Dr. Bryan Klaussen with the Mayo Clinic said, "It makes a line appear on the floor as they're using their walker so they can see that and step toward it as they're moving it's really as simple as that."