Thugs bash big man in back of head with 'metal' object on San Francisco street, knock him down. But he gets up, throws a punch — and the thugs turn into sissies. (www.theblaze.com)

A pair of thugs got a pre-Halloween scare Sunday night after bashing a 6-foot-2 man in the back of his head on a San Francisco street with what the victim later described as a “metal” object.Sure, the impact knocked Richard Titus to the ground — and left a significant wound that required five stap…