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If you've seen a couple argue in the middle of the street, it can be a pretty awkward experience, especially if they're spilling all their intimate details to the public.
But when that argument turns physical, then some might feel it's their civic duty to intervene, to ensure no one gets hurt. Well, one bloke took that idea a step further and made absolutely certain the attacker wasn't going to keep up their abuse.
CCTV captured the horrifying moment a man with rolled-up paper starts whacking a woman for no apparent reason. He keeps up his blows until she's on the ground, fending off each attack as best she can.
That's when a man comes running in from the distance and performs a flying headbutt to the abuser. Now, while we don't condone violence, this is one impressive move.
It literally knocks the attacker off his feet as his body goes flying sideways, before a bunch of onlookers help restrain him and treat the woman.
According to the Sun, a witness to the dramatic scenes said: "The man was beating his wife. She was crying and screaming. Then a passer-by knocked him down.
Another added: "It was terrifying. The woman was yelling the place down. She was trying to protect herself. This kind of violence is unacceptable."
The man has been identified by the MailOnline as Mehmet T. and it's reported that the brawl was sparked after the divorced couple attended a hearing at the Istanbul Court of Justice. The man who headbutted the attacker is understood to have suffered little more than a cut lip.
While that was a pretty remarkable headbutt, it's child's play compared to the one suffered by another man in Australia.
Jackson Vincent from Freemantle, Perth, had been visiting his grandmother in Margaret River and saw the stacked AF animal on her property at about 11.30am.
Jacko said: "I have been going to that creek since I was a little boy and there have always been kangaroos on the property.
"I was walking my dog and we saw this huge roo standing in the water. I have never seen a kangaroo standing in the water like that, we could just see his head at first, and he was one of the biggest I have ever seen.
"As I ran around him to take a picture he came closer and that was when I realised he was coming right at me and he was really big.
"I am pretty confident around animals but the moment when he started to come out of the water my heart definitely jumped and I decided to take a few steps back.
"He looked to be at least two metres (6ft 5in) tall, or taller, and must have weighed at least 100 kg (16st)."
You can see what happened in the clip above. In short, don't mess with kangaroos.
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