Dirt bikers pummel Brooklyn postal worker, disturbing video shows

A pair of dirt bikers pummeled a postman this week on a busy Brooklyn street, new video released by cops shows.

The 57-year-old USPS mail carrier was on his route in Greenpoint, pushing his cart, around 6 p.m. Monday, when the duo attempted to block his path as he crossed the street — sparking an argument, police said.  The victim continued walking, but the pair came up behind him at McGuinness Boulevard and Nassau Avenue, cops said.