Conor McGregor stuns Jose Aldo in 13 seconds to take UFC featherweight.

Conor McGregor boasted again and again what would happen when Jose Aldo stood across from him in the octagon. But even the 27-year-old Irishman never went so far as to predict that Aldo, undefeated in 18 bouts going back to 2005, would be knocked out cold in 13 seconds.

That’s precisely what happened on Saturday night inside a rabid MGM Grand Garden Arena, where a swathe of McGregor’s countrymen gathered to watch a result many grew convinced, mostly through the power of McGregor’s demeanor and words, was inevitable.

But even the most hardcore of believers could not have envisioned McGregor smoothly slipping and parrying a righthand lead from the Brazilian, then coming across with an immaculately timed left that distorted Aldo’s jaw and flung him unconscious to the canvas.

“No power, just precision,” said a matter-of-fact McGregor, who reacted to the stunning victory as if it was simple destiny. “No speed, just timing. That’s all it takes. These are four-ounce gloves. That’s all it takes.”