Father and Son Complete Marathon

Source: From LingLing's post in fb.

P/s: Read before you watch the video

One day, a son asked his dad, "Daddy, would you like to run a marathon
with me?"
The father said, "Yes."
And they ran their first marathon together.

Another time, the son asked his dad again, "Daddy, would you like to run
a marathon with me?"
The father said, "Yes, son."

One day, the son asked his father, "Daddy, would you run the Ironman
with me?"
The Ironman is the most difficult triathlon eve.
ever (4 kms swimming, 180
kms biking, 42 km running)
And the dad said, "Yes."

The story looks simple until you watch the following clip.
Just amazing, how much can love be ?