Imagine if you had to design a driving interface for an end user with no arms. How would they steer? Obviously the mechanism must either be mouth- or foot-operated, but what would the physical action be?
Check out how Richie Parker, who was born with no arms, solved the problem with his sweet '64 Impala Super Sport:
Parker is an engineer for Hendricks Motorsports, an automotive engineering company that fields no less than four NASCAR teams and has five championships to their credit. In the video below, you'll see how Parker is able to do CAD work. Also, check out the ingenious contrivance that he's rigged up that allows him to eat with silverware: