marie kerry, dean kamen, this is a guy who didn't typically finish high school. he was a talented electronic person and then at some point he saw a person go in for kidney dialysis and thought you ha sawe connected to a large machine and you have to be there for hours and it's miserable. it disrupts your job and everything about your life. so he invented the dialysis machine then he saw somebody in a wheelchair struggling to get up a curb and he felt so bad for thathe person said he started developing the mobility wheelchair that could climb stairs and also stand up on two wheels so that you can be eye to eye. it turns out the balancing something on two wheels is complicated and a lot of people told them it wasn't possible, they have to be able to back up very quickly that it's that technology that lends the segway so his idea was to reduce human suffering. >> i looked and i looked and i thought i would find one somewhere. you fall a little in love with anybody of you study and tensely but i had a very complicated relationship and it sounds he electrocuted a lot