I just came across this video on YouTube today! I cried...
One day a son asks his father: "Dad, would you like to run a marathon with me? His father says " yes". And together they run their first marathon. Another time his son asks again " Dad would you like to run another marathon with me? His father replies "yes my son". One day his son asks " Dad would you like to run the Ironman with me?" The Ironman is the most difficult triathalon that exists which consists of a 4 km swim, 180 km bicycling, and 42 km of running. His father says "yes". Rick told his father that when he competes his disability goes away. And that is what motivates his father to keep going.