Conor McGregor made his return to UFC Saturday night as he faced Donald “Cowboy” Cerrone in the main event of UFC 246.

McGregor, whose last bout was in October 2018 against Khabib Nurmagomedov at UFC 229, made quick work of Cerrone. He beat him in 40 seconds.

Broke. His. Nose. With. His. Shoulder.

This is a rap lyric in MMA form. pic.twitter.com/eKtzZUfk89

— Jeff (@JeffJSays) January 19, 2020

McGregor bloodied Cerrone with a shoulder strike immediately after the opening bell. He continued landing more strikes in a clinch and connected with a high kick. A left hand sent Cerrone to the mat. McGregor was all business and caught Cerrone off guard.

Surprise, surprise.

🇮🇪 @TheNotoriousMMA is BACK. #UFC246 pic.twitter.com/df14NZ6zq6

— UFC (@ufc) January 19, 2020

Did I seriously just stay up till 12:30 am to watch Conor McGregor knock out a guy in 40 seconds? Dang, I guess I did.....
#UFC246 https://t.co/wMvxrbH6hb

— Keira ♥ (@skeiighterboi) January 19, 2020

Twitter was just as shocked as the people who were there live to see McGregor knock someone out so fast. Just read some of the reactions:

How Connor McGregor trained for this fight! Damn McGregor pic.twitter.com/83h1LsiwLM

— Miniaan (@Miniaans) January 19, 2020

Damn McGregor, my brother went to the bathroom and when he came back the fight was over 😂 #UFC246

— Licenia Pantaleon (@licenia) January 19, 2020

It took me longer to type out this tweet than it did for Conor McGregor to knock out Cowboy. #UFC246

— Dylan Rasberry (@DylanRasberry) January 19, 2020

Damn McGregor 40 SECONDS Khabib WATCHING THIS RIGHT NOW LIKE pic.twitter.com/VQaK4MYAkF

— bond442 (@Therealbond442) January 19, 2020

Somebody said “damn mcgregor won the fight before my link even loaded” 🤣

— Sαιηт Mσ (@thirdeyemo) January 19, 2020

Bad news, the fight lasted 30 seconds. Good news, Conor has all his energy for this upcoming promo with Joe Rogan

— Big Cat (@BarstoolBigCat) January 19, 2020

Imagine paying all that money just to see McGregor knock Cowboy out in 40 seconds.

— Eriq Martin (@Ereeeek) January 19, 2020

I didn’t NOT expect Conor to knock out Cowboy that easily? I’m shook lol. @TheNotoriousMMA welcome back

— Michael 🌋 (@Michael11Nelson) January 19, 2020

It took him 2 minutes to walk to the octagon and 40 seconds to knock out Cowboy, McGregor bringing drama back to UFC 😂 https://t.co/9l0rdF1r0r

— Aman Sharma (@thesharma21) January 19, 2020

Welcome back Champ!! @TheNotoriousMMA. 🙏🏾💪🏾

— LeBron James (@KingJames) January 19, 2020

Joe Rogan interviewed both fighters after the match. McGregor sounds ready to face his next opponent.

🗣️ CONOR HAS A LIST!

Line them up, @TheNotoriousMMA is taking all comers! #UFC246 pic.twitter.com/thQithYM5X

— UFC (@ufc) January 19, 2020

Meanwhile, Cowboy was classy in defeat.

A true pioneer of the game. 👏

Nothing but respect for @CowboyCerrone! #UFC246 pic.twitter.com/mVBUVQT06X

— UFC (@ufc) January 19, 2020

The Notorious is back.

NOTORIOUS. pic.twitter.com/MwrNTegbwg

— UFC (@ufc) January 19, 2020