Israel’s B-Shoe has developed a “smart shoe” that stops wearers from falling if they lose their balance. A microprocessor and patented algorithms detect a stumble triggering the motion device to roll the shoe slightly and gently backwards until the person regains balance.
http://www.timesofisrael.com/with-b-shoes-elderly-wont-fall-as-much-company-hopes/
http://www.youtube.com/watch?v=-W1lCXtjx1I