A man had the fight of his life after a teenager and his female cohort tried to rob him on Muni in the South of Market area Tuesday, cops said.
The 24-year-old victim was zapped with a stun gun and had his backpack and cellphone stolen from him but eventually won the battle for his belongings at Third and Perry streets.
The wild robbery went down around 5:50 p.m., when a 17-year-old punk grabbed the victim by the neck and shocked him with a stun gun while his accomplice, a female, swiped his phone. The stunned victim chased her off the bus and retrieved his phone after she dropped it, police said.
The victim then got back onto the bus, only to see the teenaged punk holding his backpack, police said. The victim fought for his bag, but by then police arrived and arrested the thief.
The other suspect fled and has yet to be found, police said.
The victim was treated at St. Francis Hospital for nonlife-threatening injuries.
Officers did not recover the stun gun, police said.