Joe Rogan was left terrified by Anthony ‘Rumble’ Johnson after his swift knockout of Glover Teixeira in 2016.Johnson was the No. 1-ranked UFC light heavyweight at the time, having fought his division’s champion, Daniel Cormier, just one year prior.‘Rumble’ knocked out Teixeira at UFC 202 in Las VegasGetty‘Rumble’ was submitted by Cormier in the third round of their main event bout at UFC 187, but bounced back with successive knockout wins to put himself back in the title picture.All he needed to do was get past Teixeira, who was on a three-fight winning streak himself, having also fought Jon Jones for the title two years prior.Teixeira knocked out Rashad Evans in one round in his previous bout, and called out Johnson afterwards for a huge light heavyweight title eliminator.The pair co-main evented UFC 202 in April 2016, which was headlined by Nate Diaz‘s rematch with Conor McGregor.Teixeira rushed over to Johnson instantly from the first bell, hoping to get straight in his opponent’s face.Both men spent a few seconds sizing one another up, before ‘Rumble’ saw an opening.He fainted a left hand towards Teixeira, which prompted the Brazilian to duck before Johnson caught him with an uppercut from hell.Teixeira’s lights were out instantly, but Johnson made sure to finish the bout with some brutal hammer fists on the ground before referee Dan Miragliotta called an end to proceedings.Johnson had just knocked out one of the best light-heavyweights in the world in just 13 seconds, and UFC commentator Rogan was shocked.“Good lord, that is a terrifying man,” Rogan said as ‘Rumble’ hopped onto the fence to celebrate.Teixeira rushed towards ‘Rumble’ right from the first bellGettyJohnson fainted Teixeira with a left hand before catching up with a brutal uppercutGettyAnd the Brazilian went crashing to the canvasGetty“Be careful what you ask for, folks. Glover does not know what’s happening.“He’s wrestling with Dan Miragliotta. He thinks the fight is still going on…I do not think he understands that he got knocked out.”Johnson had just become the first man to stop Teixeira in the octagon.In doing so, he set up a second crack at Cormier’s light-heavyweight gold.Teixeira was left completely motionless on the canvas and didn’t even realise what had just happened.“There’s a level that [Johnson’s] at that no one else is at,” Rogan continued.Rogan said was blown away by Rumble’s KO, calling the UFC star ‘terrifying’GETTYRumble sadly passed away in November 2022 at the age of 38Getty“It’s a, ‘I touch you, you go to sleep level’. You can’t take a few shots, the only one who has been able to is [Daniel] Cormier.“My God, then you see Glover out cold, wakes up and tries to grapple with Dan Miragliotta, as he thinks the fight is still going on.“Just on pure instinct, wow, that’s a terrifying man. No one’s been able to do that to Glover… what a terrifying human being.“Perfectly placed uppercut… just stiff.”Johnson went on to suffer his sixth career date when he eventually met Cormier in their rematch at UFC 210 in April 2017.‘Rumble’ then left the sport for four years and finished Jose Augusto in his combat sports return under the Bellator banner in May 2021, which marked his last fight as he retired with a record of 23-6. Sadly, the UFC great passed away at the age of 38 in November 2022. Yahoo!Sports reported he died from organ failure due to non-Hodgkin’s lymphoma and hemophagocytic lymphohistiocytosis, a rare disorder of the immune system.