a price rewalk ceo larry jizinski says he hopes will fall with fda approval. >> we have done a lot of work on the level of medical benefits we see with the product. there's clearly a cost reduction with medications, and there's a great cost reduction in reduced complications. we're still gathering more data and learning really what the amounts are. but this product seems to be a product that pays for itself in just a couple of years. >> mariano says whatever the price it's worth it. the look on his son's face the first time he stood up? priceless. >> as i went up his jaw went down. and just the type of kid that -- he's not -- he always has something to say. very quick comment. he had nothing to say that day. >> piers morgan is next. [ coughs, sneezes ]