BY REBECCA BENNETT  — On Aug. 4, the City of Hyattsville held a National Night Out event at Heurich Park.  The event featured a K-9 demonstration, a city official dunk tank, rock climbing, moonbounces, a bicycle safety course by Arrow Bicycle and a Take Back the Night walk.  Free snacks were available, as well as face painting and a performance by Mandy the Clown.