She never saw it coming.

Rasa Barzdukas was grabbing a snack between her classes at the Pratt Institute around 2:45 p.m. when she saw “a very scary, monstery face” coming toward her.

“I was leaving the bodega, and I just got hit. Right in the face. Never seen the guy before, didn’t really look at him. It was just out of nowhere,” she said.

The 19-year-old got up and started walking to school but was more dazed than she initially realized, she said.

“I was just in shock, but I tried to shake it off,” Rasa Barzdukas told The Post. “I didn’t really understand the severity of it. I didn’t know what was going on.”

Video of the daytime slogging shows a man who barely broke stride as he walked up to Barzdukas outside a Clinton Hill deli Wednesday and socked her in the face. The punch sent Barzdukas flying backward onto the sidewalk along Myrtle Ave. as her assailant calmly walked away.

The attack is reminiscent of the so-called “knockout game” in which unruly teens tried to slug strangers unconscious with a single punch, while others taped the incidents. In 2013, a Hoboken homeless man was killed by three teens playing the sick sport.

The Los Angeles native was bruised in the attack, cops said, but she’s taking it like a hardened Brooklynite.

“I told my mom, I had my New York moment,” she said.

Police are still searching for Barzdukas’ attacker. Cops say he has dreadlocks and is approximately 20 years old. He was wearing a Gap hooded sweatshirt at the time of the attack.