An icy sidewalk, driveway or walking trail is a real danger. Roughly 800,000 people who slip and fall each year need medical attention, according to the Mayo Clinic . Even if you don’t end up in the hospital, slipping on ice can still be really painful, resulting in scraped knees, bruised elbows and other ailments. “These falls are quite frequent ... 1 in 5 of them actually end up in an injury that requires care,” said Dr. Kariline Bringe , an orthopedics surgeon at Mayo Clinic Health System in