Taking to Reddit, the kind-hearted samaritan wrote: "I was walking around the store and noticed a couple, young, about in their mid twenties, was alone in the corner of the store and seemed to be arguing.
BRAVE GIRL SHARES PICTURES FROM DOMESTIC VIOLENCE TO RAISE AWARENESS
"I approached them and asked if they needed any help and the girl turned away like she was hiding her tears.
"The guy just said 'no we're good, right honey?' And she just nodded with the back of her head facing me."
While most people would have walked away and dismissed the incident from their mind, the Reddit user kept close to the couple because 'something didn't feel right'.
And it was a good thing that he did, because the man suddenly lashed out and yanked the woman's arm hard, dragging her from the store and shouting in her face.
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After asking the store's security guard to call the police, the Reddit user walked out to confront the abusive man.
"The dude grabbed her hair right in front of me and tried to pull her into the car just yelling 'get in the f**king car, we're leaving'.
"She was screaming and I kept trying to reason with him, obviously there was no way to reason with this d**khead. So I blocked his car door and stood there not moving.
"Then he slapped me. A slap? I knew this dkhead was a little weakling on the inside just trying to prove he's some kind of alpha male by taking it out on his girlfriend."
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BOY'S HORRIFYING 999 CALL USED IN DOMESTIC VIOLENCE CAMPAIGN
"I didn't retaliate, was difficult, but I didn't hit him back. He pushed me out of the way and let go of the girl, got in his car and sped off. I consoled the girl who was just going ballistic.
"I brought her inside the store and calmed her down a bit. The police showed up and got their reports, looked at our cameras and identified him. The girl obviously had bruises, cuts, and scrapes on her like this has been going on for a while. She thanked me immensely afterwards and gave me a hug."
He added: "I grew up with awesome parents, and an awesome dad who taught me how to treat a woman right.
"[In a way] I'm glad I experienced this and it had really opened my eyes to a situation I have never seen."