This is the horrifying moment a large man knocks out his girlfriend after he brutally attacked her in a parking lot during a heated argument.

His savagery doesn't end there however as he goes on to assault a female passer-by who tried to help the woman, attempting to wrestle her mobile phone off her and get rid of any evidence.

The video was filmed from the window of a nearby building in the central Russian city of Yekaterinburg, in the Sverdlovsk Oblast region and shows the young couple standing in front of their car.

The girlfriend can be seen angrily slapping and punching the larger man in a shirt, who stumbles around but doesn't retaliate as she continues to antagonise him shouting: 'What the f**k did you do? before embracing

However, something in the their conversation suddenly changes the nature of the argument and suddenly he lands a hard blow to her face

At first the girlfriend can be seen angrily slapping and punching the larger man in a shirt, who stumbles around but doesn't retaliate as she continues to antagonise him.

Both of them scream at each other with the woman shouting: 'What the f**k did you do? as she repeatedly punches him in the face and chest and kicks him in the legs.

Her emotions seem very divided as after he slams the car door as she tries to climb in and shakes her, the two cling on to each other desperately and it almost seems all is resolved.

'I love you, you stupid one,' he says.

However, something in the their conversation suddenly changes the nature of the argument and suddenly he lands a hard blow to her face - much harder than any of her attacks.

The man becomes even angrier and delivers numerous hefty punches which are so forceful she collapses to the floor, bleeding.

A passing female good Samaritan runs up the pair in horror, shouting, 'She is in pain!' but the man, senseless with rage, pushes her away and roughly picks up his girlfriend by her clothes.

His blows are so forceful she collapses to the floor, bleeding and clutches her head in agony as he initially starts to walk off

A passing female good Samaritan attempts to break up the fight she she later feels his wrath too when he tries to wrestle her phone out of hand fearing she had filmed the the incident or was calling the police (right)

As the scared woman walks away the man charges towards her and attempts to snatch the phone she is holding out of her hand, fearing she had filmed the the incident or was calling the police.

He soon gives up and returns to his girlfriend who he puts in the passenger seat before again running back over to try and get the woman's phone again.

She can be heard screaming: 'Do not touch me! Get your hands off me!' as he bargains with her before abandoning the idea.

The video ends as the man gets back in the car and drives away.