They came. They saw. They plunged. More than 8,000 people gathered on the Jersey Shore on Saturday for the state’s largest polar plunge as revelers braved frigid late-winter temperatures to take a dip in the Atlantic Ocean. Lined up on the sand in front of yellow caution tape, the thousands in attendance — what may be a record — waited as a countdown from NJ 101.5′s “Big” Joe Henry unleashed a flock of plungers at about 1 p.m. Some dressed for a typical beach day. Others got more creative, including attendees dressed as a stormtrooper from “Star Wars,” a wrestler, a piece of bacon and a banana…