The first whistle blows at Holm Park, a foul is committed within two seconds, and there's really nothing else I can tell you that better conveys what's at stake.
This is the Lowland League title race, and at the conclusion of an engrossing afternoon in Yoker, it had been blown wide open.
Much of the credit for that goes to Clydebank's Neil McLaughlin, whose six-minute first-half hat-trick set the home side on their way to a 5-1 demolition of league leaders Bonnyrigg Rose.
Nothing but victory would have done for the second-placed Bankies, whose dream of a return to the senior leagues is as close as it's ever been since their descent into oblivion at the turn of the millennium.
They arrived for this top of the table contest eight points adrift of their visitors, but could soon draw within two if they win an upcoming game in hand. With Tranent, Caledonian Braves, and potentially Linlithgow Rose, all within reach of the summit, there is an almost overwhelming amount to play for.
This weekend, however, belonged to Clydebank who, after this, will firmly believe the season can be theirs, too.
And why not?
The clock has barely struck two on Saturday afternoon, and already Holm Park is pushing capacity. There are 1200 in here by the time kick-off arrives, from the diehards who still remember the glory days, to a new generation decked out in white and red.
Young, old, they are all share the same dream; Clydebank as an SPFL club.
This is not their ancestral home - Kilbowie Park has long since been replaced by, among other things, a McDonald's - and they have shared it with Yoker Athletic since 2008.
An application to install a seated enclosure is under review, one which would allow Clydebank to meet the criteria for a Scottish FA Bronze license, a prerequisite for SPFL entry.
But if that is to happen this year, an inconsistent start to 2026 has left Gordon Moffat's team with precious little margin for error. A Bonnyrigg victory, and an 11-point deficit, would likely be terminal for their promotion hopes.
Even a draw is suboptimal. Coattails can't be clung to for very long, and Clydebank need something to get them running freely again.
Their need is reflected in Moffat's team selection, which is heavy on attacking talent. It's an obvious signal that the home side intend to go at this full throttle, something Bonnyrigg manager Jonny Stewart later says he emphasised over and over to his players.
They make the journey down the M8 in a strong position, and could become the first team to win promotion to the SPFL on two separate occasions, which would trump the less welcome record of being the first team to be relegated back to the Lowland League after winning it.
There's a do-or-die element to this for Clydebank, but it's also a golden opportunity for Bonnyrigg to take a giant leap towards the title, a fact not lost on the 250 travelling fans intent on making themselves heard in the far corner.
The tone for the afternoon is set by that aforementioned attempt on the Guinness World Record for fastest foul, Alassan Jones left looking bemused and bewildered as he's left in a heap after being run down by Clydebank's immediate advance into Bonnyrigg territory.
If it's an attempt to unnerve the visitors then, initially, at least, it appears to fail.
Jones himself is quickest to react to his own hoisted hook forward, and with Clydebank wildly out of shape near the halfway line, the ball finds its way to Cammie Ross, and he tears through the gap to slot beyond goalkeeper Owen Stott after nine minutes.
There's a stunned silence in the home end, which means each and every one of them hears Bonnyrigg's Kallum Higginbotham loudly proclaim 'that's how easy it is' amid the ensuing celebrations. The 36-year-old doesn't know it yet, but it is a declaration that is about to age so terribly that even he may appreciate his own masterclass in unfortunate comedic timing.
His words are launched back at him 100-fold from the home fans before the final whistle, but there is surely no one among them who is not themselves stunned by what happens next.
Across 35 minutes either side of the interval, Bonnyrigg capitulate and concede five times, which my Standard Grade arithmetic makes to be about 20% of their goals lost for the entire season prior to kick-off.
McLaughlin claims his hat-trick in a relative blink of an eye, and an exquisite first is the pick of the bunch. Nicky Low's whipped pass into Keir Samson is turned first-time around the corner to McLaughlin.
16 yards out and faced by a ruck of red shirts, he takes the only route to goal available - an audacious dink that leaves goalkeeper Ross Connelly thrashing at thin air.
McLaughlin doubles his tally on the rebound with a well placed header, then makes it three with a textbook striker's finish; pulling the ball in under pressure and finding a corner before an increasingly shellshocked Bonnyrigg backline can react.
The scale of their head loss is personified by Samson being permitted free entry into the box to finish off a quick free-kick that yields Clydebank's fourth.
Bonnyrigg need the half-time whistle but it offers little solace, as all that awaits is 15 minutes in the company of their presumably furious manager. Whatever is said in the dressing room, the break simply delays further misery.
Dom Docherty adds a fifth before the hour mark as Clydebank transition seamlessly to game management mode, their day's work already done in that remarkable first-half flurry.
"We knew we had to win today," says Moffat. "We had to take gambles with the shape and personnel within that, but even if you put systems aside, I just thought our boys were the better team. We were hungry, snapped into second balls, and did the basics really well."
It's a fairly understated assessment of what could prove to be the most seismic result of the Lowland League season, but Moffat will be understandably wary of overblowing it with so much football to be played.
Rediscovering their early season consistency will decide how far Clydebank can take this title race, but on days like this you can feel that there's a historic old club here that feels like it's going places again.
"It did feel like an occasion," Moffat continues. "We knew that during the week when we saw the ticket sales, we knew it was going to be a sell-out. It's a wee taste of things for us.
"It's easy to forget there was two divisions between these teams a year ago, we've stepped up and we're competing well at the minute. I've a lot of respect for Jonny; they're a really good side and it just wasn't their day - but shows how good a performance this was for us."
This will be a difficult one for Stewart and Bonnyrigg to process; how often, at any level, do you see league leaders and title favourites dismantled as comprehensively as this?
"I don't know where that came from, to be honest," says Stewart. "I told the players what to expect. Sharpness, hunger to win second balls, desire to do the dirty side of the game, we didn't match that. Clydebank were really good, and deserved the three points. I can't be too critical of the players, they've been on an incredible run this season."
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Over and above Stewart's general assessment, which he keeps impressively diplomatic in the circumstances, is his emphasis on Bonnyrigg getting back up at the first time of asking. Winning the Lowland League earns you a two-legged tie with the Highland League champions, and then comes a double-header with whoever finishes bottom in League Two.
It is a slog, and will only get tougher when, from 2026/27 onwards, an East/West split in the Lowland League turns that first two-legged play-off into a three-way affair.
"Our first thought at the start of this season was we need to get back up as quickly as possible, because the reconstruction will only make it harder," says Stewart. "It's good to have guys in the changing room who have been there and done it before, so they know what it's all about."
They may yet get there, but this stirring day belongs to Clydebank who, thanks to this effervescent performance, can keep dreaming of more to come.
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