An Arsenal fan was brutally mocked by Southampton's own social media account after the Saints beat the Premier League leaders 2-1 in the FA Cup quarter-finals.
Southampton, who were relegated from the Premier League last season after scoring just 12 points, now look a completely different side under the management of Tonda Eckert.
They opened the scoring in the first half at the St Mary's Stadium through Ross Stewart, who missed significant periods of last season through injury.
Viktor Gyokeres levelled the scores on 68 minutes for Arsenal with a first-time finish from Kai Havertz's cutback.
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But that setback only spurred Southampton on in front of their own fans, and they found an 85th-minute winner through former Manchester City midfielder Shea Charles - who will surely play Premier League football next season whether with the Saints or elsewhere.
For Arsenal, it caps off a nightmare fortnight which first saw them lose the Carabao Cup final to Manchester City at Wembley.
That means the chance of a historic English football quadruple is now off, though they do still lead the Premier League table and are in the quarter-finals of the Champions League.
Still, it was Southampton's night on Saturday - and those operating their Twitter account made sure to let everyone know it.
After one Arsenal fan replied to their full-time post calling it a 'fluke win', Southampton replied: "Enjoy your quadruple, pal."
In another reply to a now-deleted message, they posted a photo of singer/songwriter Rod Stewart alongside the caption: "Done well beating Arsenal with him up top."
They then responded to broadcaster and Gunners fan Piers Morgan, who had described the Southampton clash as a 'great draw' when it was made back in March, with a photo of goalscorer Charles looking at the camera.
Southampton are previous winners of the FA Cup, having lifted the trophy back in 1976 when they were in the Second Division (now Championship).
And the Arsenal victory was somewhat belated revenge for losing to the Gunners in the 2002/03 FA Cup final, which was played at the Millennium Stadium in Cardiff due to ongoing regeneration works at Wembley.
The 2025/26 semi-finals will take place at Wembley on the weekend of April 25 - by which stage the Saints will hope to be embedded firmly in the Championship play-off places.
They dropped behind Wrexham into seventh place over the weekend but Phil Parkinson's side, who are only one point clear, could only draw at West Brom and have now played a game more.
When the Saints sacked manager Will Still in November, they were in 21st position, with Eckert - at 33, the youngest manager in the Championship - taking caretaker charge before being appointed permanently.
The German has led Southampton up the league table with some positive football, and they now haven't lost in any competition since January 21.
That included coming from 3-0 down to beat Leicester 4-3 in a thrilling game at the King Power Stadium, which only served to underline how Southampton have moved forward in recent months while Leicester - also relegated last season - have gone in completely the other direction and now sit in 22nd place.
Topics: Southampton, Arsenal, FA Cup, Football
Ryan Smart