Conor McGregor stopped Jose Aldo with one spectacular punch just 13 seconds into the first round, backing up his bravado and claiming the undisputed featherweight title at UFC 194.
McGregor (19-2) finished the fight in Las Vegas with an electrifying exchange shortly after the opening bell, slipping Aldo's lead right and cracking Aldo on the jaw with a huge left hand.
Aldo had won 18 consecutive fights over the last 10 years, but nothing seems to slow McGregor.
"He is already beaten," McGregor said prior to the fight.
"I look in his eyes, and I see someone who knows his era is over.
It's a new era.
It's my era.
I almost want to comfort him.
I want to say, 'Don't worry.
It will all be over soon.'"