When Sarah de Lagarde slipped at High Barnet underground station in September last year she was run over by two tube trains, losing both an arm and her leg. After months in hospital, learning to walk again and a fundraising campaign, Sarah has become the first person in the world to operate a new bionic arm which can read her mind. Report by Blairm. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn