how does one accidentally run?

C has been having severe allergy related issues this spring, much like last spring but worse complete with an asthma type attack, low Oxygen level etc etc...He went to the doctor on Tuesday had a breathing treatment was prescribed a few things fine okay he is improving. The nurse practitioner had also sent along a note excusing him from recess & gym for the remainder of this week which I told him included afternoon outdoors play at daycare. He was none too thrilled because what fun is it sitting down with a book when you can be up and playing with your friends, he even asked me to pick him up early because he couldn't play. I just got a phone call from him from school which to start with I shudder to see the school on caller id but luckily it was just C letting me know he "accidentally ran" but felt just fine and could he play at daycare? So beware of accidental running it can happen anywhere...