he was paralysed, unable to walk and unable to have a child. regular walking with the implant has improved his health to such an extent that he was able to father a child last year. it was great fun. it's the first time i've been i walking with her in that way — she with a baby walker, i with my walker. - she could beat you! 0h, she can, and she even. beats me without the walker, so it's a bit embarrassing! hey, david! hey, guys! good to see you, man. good to see you. how are you doing? i'm fine. the technology has helped david and michel do more in their lives, but it cost more than £100,000 for the first two years, and it'll need more improvements in clinical trials over several years before it can move out of the lab into the clinic. cheers! but it is a new way forward for researchers. pallab ghosh, bbc news, lausanne.