signal to your leg to lift the leg. if it's not working properly, they were giving electrical shocks in my leg when my leg was supposed to move in a certain direction sending a signal back to my brain so it's sort of creating a two-way circuit. >> dr. sanjay gupta can do everything. >> i love this stuff. i was fascinated by it. >> and that's why you do it. the question is, what's next for her and her recovery? >> she is making -- people use the word remarkable. i think it's fair to say given where she's come already, now it's a lot about occupational therapy. being able to brush your teeth, feed yourself with a spoon, dress yourself, those types of things. that's what you need to do to function in everyday life. also the future of physical rehab is here. i was there when they were using robots, a few images there, that's brand-new technology that increases mobility and strength. i'm playing a video game which