For some people, the RunKeeper coach's voice is enough to keep them motivated during a jog. Others need something physical to keep pace with That's where Puma's BeatBot comes in, developed by a NASA robotics engineer, a trio of MIT students and Puma's ad agency, the robot follows lines around a track at any pace you'd want. It can even match Usain Bolt's 2009 foot-speed world record of 44.