http://www.thesmokinggun.com/archive/years/2009/0902091slap1.html

He should have slapped the mom but she was probably a lot scarier than the kid. That or his arm wasm't long enough to reach her face. How dumb can you be? Everybody knows that only a mom can slap her kid in WalMart.
I wonder if he was one of those "Greeters" and he just lost it. Could this be the new "goin' postal"?!?