Down 3-0 after the first leg at the Camp Nou, Liverpool did the unthinkable at Anfield, turning around the tie with four answered goals in one of the greatest comebacks the Champions League has ever seen.

With a three-goal deficit and without two of their famed front three in Mohamed Salah and Roberto Firmino (both injured), Liverpool got two goals apiece from Divock Origi and Georginio Wijnaldum to shock Lionel Messi and Barcelona and reach the Champions League final.

Here's how social media reacted to the latest -- and maybe most improbable -- in a long line of magical European nights at Anfield...

A MIRACLE IN ANFIELD!

Down 3-0, Liverpool come back to defeat Barcelona and reach the Champions League Final for the second straight year ? pic.twitter.com/Ftx5Xl6f5t

— SportsCenter (@SportsCenter) May 7, 2019

Hard to argue with this quote after watching that performance from Jurgen Klopp's Liverpool and the fans at Anfield.

"Here is one thing everyone inside Anfield knows, including our opponents. This Liverpool never stops. This Liverpool never quits. This Liverpool gives everything at all times." ❤️ pic.twitter.com/0ELb61N8Ab

— Liverpool FC (@LFC) May 7, 2019

Mo Salah believed.

We never do, Mo! ?#AllezAllezAllez pic.twitter.com/B0oTiXWRc7

— Liverpool FC (@LFC) May 7, 2019

Count investor Lebron James in among those who were captivated by Liverpool's comeback.

??‼️‼️‼️‼️‼️‼️ AMAZING NIGHT FOR THE REDS. WOW‼️‼️ #YNWA❤️ https://t.co/n9tuwtaj8z

— LeBron James (@KingJames) May 7, 2019

BT Sport brings up a good point: Where does this comeback rank among Liverpool's greatest?

2005: Liverpool 3-3 AC Milan

2016: Liverpool 4-3 Dortmund

2019: Liverpool 4-0 Barcelona

This. Club. Does. Comebacks. pic.twitter.com/y52v9Hh8Tz

— Football on BT Sport (@btsportfootball) May 7, 2019

Seven percent chance of advancing... tell that to Liverpool!

How unlikely was Liverpool's comeback?

- Barcelona was -3000 to reach the final, according to Westgate

- FiveThirtyEight's Soccer Power Index gave Liverpool a 7% chance to advance

- They didn't have their 1st and 3rd-leading scorers from the last 2 years (Salah & Firmino). pic.twitter.com/qHD3IjY1Mm

— ESPN Stats & Info (@ESPNStatsInfo) May 7, 2019

Let's check in with some of the heroes from the night...