Ross County created a massive upset by beating 10-man Celtic in a frenetic League Cup semi-final at Hampden Park.
Gary Mackay-Steven scored after only 26 seconds to give Celtic the lead, but the turning point came when Efe Ambrose was sent off for fouling County’s Alex Schalk in the box.
Martin Woods scored from the penalty, Paul Quinn headed a second after the break and Schalk hammered in the third.
Scott Fox saved Leigh Griffiths’ penalty to secure a place in the final.
County seized the day once Ambrose departed and deserved what was a momentous victory for the club.
This time last year, they were rock bottom of the Premiership, six points adrift. Now they are sitting fourth in the league and in the League Cup final for the first time in their existence, where they will face Hibernian on 13 March.
All this came despite County looking a shambles in the early minutes. Celtic were ahead in the blink of an eye.
Callum McGregor played a ball through the giant chasm between County’s centre-halves and in motored Griffiths, who ran on freely before squaring to Mackay-Steven.
That goal could have been followed by others. Griffiths had the County defence tied in knots in the minutes that followed.
Ambrose twice went close with headers, the second of them kicked off the line by Richard Foster. It was so easy for Celtic and then, in a sudden twist, it became impossibly hard.
In that fateful moment, Mikael Lustig allowed Schalk to get away from him and on to a loose ball in the Celtic penalty area. Ambrose was slow to appreciate the danger and, in his attempt to recover his ground, his knee came into contact with Schalk, who went over.
It was a penalty and it was a red card for Ambrose. Storm Efe had done its damage again and Woods sent Craig Gordon the wrong way from the spot.
Celtic, to their credit, had the best of the rest of the half. They brought on their new recruit, Erik Sviatchenko, for the unlucky McGregor, to plug the Ambrose gap and create some trouble for County.
Stuart Armstrong and Lustig had half-chances but could not capitalise. When the next opportunity fell to County, they were infinitely more ruthless.
McIntyre’s team went at Celtic and got their reward. From a corner that carried to the back post, Andrew Davies nodded precisely to Quinn, who buried his own header past Gordon.
The goalkeeper complained bitterly that he had been impeded as the delivery came into the box – he was booked for his trouble – but he would have been better off castigating his defenders, who allowed two free headers so close to his goal.
Celtic’s misery – and vulnerability – was seen again just after the hour, when Woods played Schalk through on goal and the Dutch Under-21 striker thumped his finish into the top corner.
Again, Celtic’s defence was a soft touch, easy prey to a simple pass through its heart.
Even when Celtic got a very fortunate penalty, given against Brian Graham for handball, Griffiths – of all people – could not convert. Indeed, Celtic had to rely on Gordon making a fine save from Jackson Irvine to avoid a fourth.
It hardly mattered. County created history none the less. For Ronnie Deila’s Celtic, this was a catastrophic day and an abrupt end to their treble dream.
Premier League spending on transfers in a single season could break the £1bn mark for the first time.
The 2014-15 campaign saw a record £965m spent, but this has already been surpassed this season and it is likely the final figure will be in excess of £1bn by Monday’s 23:00 GMT deadline.
The BBC will bring you extensive coverage of deadline day online and on radio, television and social media.
Live text commentary begins on the BBC Sport website at 07:00 GMT.
Where can you follow deadline day on the BBC?
Our Transfer Deadline Day (TDD) live text commentary gets under way at 07:00 GMT and you can access it from your computer, tablet or mobile via the BBC Sport website or app.
We will bring you the latest news, analysis, gossip and done deals from our reporters around the country and worldwide. You can also have your say on the potential transfers and signings as they go through. We await plenty of eyewitness reports of Gareth Bale at Manchester Airport…
Our transfers page will capture every confirmed move, while each club page will be updated with the latest transfer stories.
Most of the Premier League deals done in this transfer window have been by teams near the foot of the table.
The most expensive signings by a British club have been the £12m Newcastle spent on England midfielders Jonjo Shelvey and Andros Townsend. The most expensive sale has been Brazil midfielder Ramires’ move from Chelsea to Chinese club Jiangsu Suning for £25m.
Bournemouth, backed by Russian businessman Maxin Demim, have spent £16m in total on strikers Benik Afobe from Wolves and Lewis Grabban from Norwich.
Struggling Sunderland and Norwich have made five signings each. Could Tunisia midfielder Wahbi Khazri help the Black Cats get out of relegation trouble? The Canaries have boosted their attack with the signings of £8m Steven Naismith from Everton and Patrick Bamford on loan from champions Chelsea.
Mid-table sides Southampton and Watford were perhaps thinking about a push for a European place when they brought in Charlie Austin and Nordin Amrabat respectively. Liverpool manager Jurgen Klopp has had his first chance to spend the Reds’ money – although fans might expect more than just defender Steven Caulker on loan from Championship side QPR by the close of TDD.
Chelsea are the wildcard in the middle. Will Brazil forward Alexandre Pato and USA defender Matt Miazga improve Guus Hiddink’s squad?
Meanwhile, Crystal Palace might have grabbed the freebie of the winter with the signing of former Arsenal, Manchester City and Spurs striker Emmanuel Adebayor.
Teams at the top end have yet to twist. Arsenal spent a modest £5m on Mohamed Elneny from Basel and Leicester paid Birmingham £3.7m for bright midfield prospect Demarai Gray.
It is make or break day for many clubs during what has been a closely fought Premier League season.
For the sides at the wrong end of the table, there is extra significance – drop out of the top flight and lose out on £99m, guaranteed next season as a result of the new £5.1bn TV rights deal.
At the top end there are only five points separating leaders Leicester and Tottenham in fourth – so one big signing could make a significant difference.
From Newcastle’s bid for West Brom’s Saido Berahino to Liverpool’s pursuit of Shakhtar Donetsk midfielder Alex Teixeira, BBC Sport’s chief football writer Phil McNulty has identified 10 men who could still make a last-minute move.
Stay across the BBC on Monday for news on all the deals and near misses – it promises to be a fascinating day.
When do the windows shut?
Here are the dates and times for when the respective windows will shut across Europe. Odds on a club leaving it too late?