A tough-as-nails 72-year-old NBC production director was pummeled by a pack of brutes in Midtown — but laughed off the attack by telling The Post, “I didn’t go down.”

The Jersey man, John Sullivan, was walking on Sixth Avenue near West 43rd Street on his way to work at 30 Rock around 2:20 a.m. Monday when eight men surrounded him.

“They started hassling me,” Sullivan said. “At first the shoved me and then they started circling around pointing at me, yelling ‘Boo.'”

Sullivan, who has made the same commute for 53 years without incident, said he didn’t know what to think of the group and tried to get away.

“Then they started slugging me… I got pummeled pretty good,” he recalled. “Don’t know why they’d pick on a 72-year-old guy, doesn’t take much courage.”

It was unclear what caused the men to attack Sullivan, who has worked on “Saturday Night Live” and “The Tonight Show” — but the Vietnam vet was in good spirits recalling the encounter Tuesday.

“I didn’t go down… about 30 seconds worth of fun,” he said.

Sullivan said he tried to fend off the fiends with his hard-shelled Halliburton briefcase, blocking some of their punches and landing a few shots himself.

“I stood up for myself… I’m used to fighting back if I have to.”

Sullivan escaped with a few cuts and bruises, thankful he wasn’t stabbed or lost any teeth, he said.

He refused a trip to the hospital with EMS, but his employer, Plaza Productions, an NBC affiliate, had a doctor check him out when he got to the office.

“They sent me home and gave me the rest of the week off because I look like hell,” he said, laughing.

The NYPD released images Monday night of possible suspects.