Riana,
"You would ENGAGE the threat rather than escape it? Most people of average intelligence would prefer to avoid an encounter than to have one."
It appears Zimmerman was willing to, of course he had a loaded gun.
WHY didn't he wait for the cops? It wasn't as if Trayvon was attempting to break in to someones home, or holding someone up.
If Zimmerman was trailing Trayvon, the 'Stand your ground law' would be on Trayvon's side.

DO SOMETHING!