A 24-year-old man was sliced across the face for no apparent reason after leaving Famous Hakki Pizza at Essex and Rivington Streets this morning. A police spokesman said that the victim had just bought a slice and stepped onto the sidewalk when the unknown assailant cut him from his left cheek to the bottom of his chin at around 2:15 a.m. with a sharp object and then fled. The victim was treated at Bellevue Hospital. Check back later for further details.