All I can say in response to this is, ”Where can I get one of those powerchairs?” The land speed record for an electric wheelchair has been broken by a guy with Motor Neurone Disease: ”Jason Liversidge, who has motor neurone disease, reached nearly 67mph (108km/h) at Elvington Airfield, near York. The father of two, from Rise in East Yorkshire, had been aiming for the record for about three years. The world speed record for an electric all-terrain mobility vehicle was previously 62mph.” I’ll tell you now, 8mph feels fast in a powerchair, so seventy would be scary. Mind you, it would make the trip to Tesco and back a bit quicker.