Milwaukee police say a person wearing a mask was surprised Saturday night when, right in the middle of an armed robbery attempt, a restaurant worker pulled out a gun and started shooting.  Witnesses say the would-be robber ran outside, jumped into a stolen car and took off.  The suspect didn’t get very far, though, when the car crashed into an alley less than one block away.  Milwaukee police say they haven’t arrested anyone.  There were no reports of injuries.