**WARNING: DISTRESSING CONTENT BELOW**
Rousey suffered a potentiality career-ending first-round loss to Nunes last month in the main event of UFC 207.
But it took mere seconds for a man to be sent down with just two punches in footage of a savage attack.
In the clip, a massive bloke has clearly picked on someone the wrong size despite choosing a skinny lad as his opponent.
They say you should never underestimate your rivals, something the poor man learnt all too quickly.
The video – viewed more than 20,000 times online – shows the bulky bloke being sent to the floor after just two punches.
“That was a total sucker punch, what a coward”
The video begins with the bigger man – dressed in a tight white T-shirt – goading his smaller sparring partner.
The pair have clearly gone outside to sort out their differences, with the bigger man cocky about his weight advantage in the street fight.
But he shouldn’t have underestimated his skinny rival’s fighting power.
With just two brutal punches to the face the man is destroyed by his opponent.
He flies backwards and is left lying on the cold concrete as his pint-sized nemesis walks away unscathed.
A woman recording the violent seconds-long encounter on her mobile phone can be heard gasping in shock.
But viewers commenting on the footage – filmed in a car park in an unknown location – criticised the smaller guy’s technique.
One commented: “That was a total sucker punch, what a coward.”
“Not exactly a fair match,” another person said.
Last year a cocky bloke was criticised for picking on a man half his size – but got his karma when he was sent flying with just one punch.
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