A 24-year-old man punched a man in the nose in a possible “knockout” attack in lower Manhattan Wednesday, and was caught minutes later, police said. Laval Woods of Harlem is charged with felony assault in the 2 p.m. incident for allegedly sneaking up behind the victim, who is 74, on Fulton St. and hitting him. A bystander saved the victim from hitting the ground, said witness Misha Erwitt. PHOTO EXCLUSIVE: Laval Woods of Harlem is arrested for punching a man in the nose at about 2 p.m. in Lower Manhattan.