Paleogal wrote:
> I'm at a loss to understand the running.  Why pound your bones into the 
> ground?  
>   
It's a choice of one of the instinctive responses to the excessive 
stress of modern life (fight/flee/hide).
Rewarded by a "feel-good" brain chemical (serotonin?).

I chose "hide", and find myself in a wild forest. Peaceful and low 
stress except for the pesky beavers. Um, and a hysterical news report of 
a lion, which turned out to be both a cute cub and a pet.

William