How the rest of German football must have shuddered as Tyler Adams' shot took that deflection and flew into the net.
This was everything the traditionalists have feared coming true in what must have seemed like slow motion and with only two minutes to play.
To pinch the slogan of their owners Red Bull, the most hated club in Germany - RasenBallsport Leipzig - have got their wings and flown into the semi-finals of the Champions League.
The RB Leipzig players celebrate their win over Atletico Madrid on Thursday evening to advance into the semi-finals of the Champions League for the first time
Tyler Adams fired home the winning goal via deflection as they stunned Atletico in Lisbon
Leipzig manager Julian Nagelsmann celebrates wildly on the sidelines after the winning goal
On the face of it, a club that progresses from the fifth tier of German football to within two wins of European glory within 11 years would be something only Hollywood writers could script.
But the perception in Germany is very much of an energy drinks empire taking over a tiny club, changing them beyond all recognition and bankrolling them up through the leagues while flouting every rule in place to stop precisely this happening.
RB Leipzig haven't even won the Bundesliga in their short history but, all of a sudden, could go one better and conquer Europe having played a mere 17 Champions League matches - ever.
Having seen off Atletico Madrid 2-1, next up for Julian Nagelsmann and his team is a semi-final against Paris Saint-Germain on Tuesday next week.
It will certainly be difficult but these one-legged knockout games have added an extra layer of unpredictability so Leipzig reaching the final certainly cannot be ruled out.
There will be rejoicing at Red Bull in any case. The Austrian energy drinks firm brought in revenues of over $6billion in 2018 having sold 7.5billion cans in 171 countries worldwide.
Timo Werner celebrates in front of the RB Leipzig logo that looks very similar to Red Bull's
RB Leipzig have risen from division five to the Bundesliga under the ownership of Red Bull
2005 - Red Bull Salzburg (Austria)
2006 - New York Red Bulls (USA)
2007 - Red Bull Brasil (Brazil)
2009 - RB Leipzig (Germany)
2011 - FC Liefering (Austria)
Their expansion into sport in the past 20 years goes far beyond simply paying for sponsorship on shirts and advertising boards in stadiums.
Their way of doing things is ruthless and highly controversial. The Austrian club SV Austria Salzburg had been around since 1933 and had won various domestic honours and even reached the UEFA Cup final in 1994.
But when Red Bull came in and bought the club in April 2005 it was thoroughly rebranded. The team name, management, staff, logo and kit colours were all changed with Red Bull declaring 'this is a new club with no history.'
This overnight eradication of the previous 72 years of history outraged the club's supporters, some of whom broke away to form a new club.
This fan-owned club, SV Austria Salzburg, currently play in Austria's third tier in a 1,600-capacity stadium.
Meanwhile, Red Bull Salzburg have been transformed into Austria's pre-eminent side, with 11 league titles since and regular Champions League football.
They've also nurtured a succession of highly talented young players before selling them on to bigger clubs for profit, with Sadio Mane, Erling Haaland and Takumi Minamino the most prominent.
Around the same time, Red Bull used a similar strategy to buy out the Major League Soccer side New York/New Jersey Metrostars.
Red Bull Salzburg have just secured another Austrian Bundesliga title - their 11th since the energy drinks company took over the club in 2005
RB Leipzig and RB Salzburg played each other twice in the 2018 Europa League group stage
Norwegian striker Erling Haaland shone at Salzburg before moving to Borussia Dortmund
Again, everything about the club was rebranded pretty much overnight to the New York Red Bulls and they were soon playing at the Red Bull Arena and wearing the firm's charging bull on their badge.
Unlike their Austrian sister club across the Atlantic, Red Bull at least decided to acknowledge the Metrostars' previous existence.
And with stars such as Thierry Henry and Tim Cahill pulling on their shirts, not to mention the likes of Shakira and Wyclef Jean performing at their first official match, a buzz was soon created around the new-look club.
In the franchised system of the MLS, the rebrand didn't attract as much controversy but it showed how their takeover template works.
But it was always the ambition of Red Bull managing director Dietrich Mateschitz to get a football foothold in Germany.
Arsenal legend Thierry Henry was an early big-name signing made by New York Red Bulls
Red Bull's gaze was fixed on Leipzig as early as 2006