Dad maybe forgot to add that... or he didn't think it was relevant ?
Except that if you're unable to run-- the last place you want to take your energetic child is a park.
Kids love to run !
BBM
If Maddox dad knew he liked to run and hide, why take him to a park/open area where it would be difficult to keep up with him ?
Even if it hurts-- if your child runs off-- you don't think about it-- you just RUN and forget your discomfort.
Although maybe the friend was supposed to help watch Maddox and catch up with him if he ran out of sight ?
Trying to understand this in the light of new revelations.
Was it in the presser that the dad said he emptied his pockets and gave his stuff to the person with him so that he could run after Maddox? So I don't think it was the other person who was doing most of the running.
Like you've said, maybe he just ran through the pain barrier to look for his son?