A team of engineers at Brigham Young University are developing smart skates specifically for athletes who spin, jump and do crazy pirouettes on ice. Why? Well, figure skaters land with a force equal to six times their body weight when they jump (according to the team's paper published earlier), so they're prone to injuries like broken bones and impacted joints. These special skates can measure how hard the athletes land, enabling them to correct angles or to time their spins better to prevent accidents. Unfortunately, you can't just put a small analyzer on skates like you would on a baseball bat or a tennis racket to measure the force of a landing.