WWE Superstar Dean Ambrose Fan Attempts Sneak Attack After Smackdown

Dean Ambrose, one of the giants in the WWE, was almost attacked during a taping of Smackdown ... attacked by a guy some say was holding a sharp object which at least one fan says was a knife.
It happened right after the show in Providence.  You see the would-be attacker come right for A
mbrose, but a quick-thinking security uses a wrestling move of his own, body slamming him to the ground.
It's unclear what happened to the guy or what if anything he was clutching.
 Dean was unharmed.