What a start to day two - and the best news is we've still got another three Rugby World Cup matches to go!
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BBC Sport at Kingsholm
Absolute scenes here at Kingsholm as Georgia rightly do a lap of honour.
It might not dominate the newspaper headlines in this country tomorrow morning, but what a great moment for Georgian rugby union.
At previous World Cups, they'd only ever registered wins over Namibia and Romania, but this victory over Tonga, ranked 11th in the world and only one place below Scotland, is a significant one.
Georgia have done it! Nigel Owens' full-time whistle sparks jubilant celebrations, led by their superb captain Mamuka Gorgodze. Their best-ever moment at a Rugby World Cup, no doubt.
Tonga win a penalty, which they'll send to touch. Is there a sting in the tail? Perhaps not - because Georgia will put into the scrum following the aftermath and this match could well be theirs.
The stats tell their own story for Tonga, but they're slipping to defeat...
But fly-half Lasha Malaghuradze, deputising from the tee with Merab Kvirikashvili in the sin bin, drags it wide. Still the match hangs well and truly in the balance.
The forward pass means a scrum - and Georgia win a penalty! Their pack has put them in a winning position in this game, and they may well have seen them over the line there too.
Lasha Malaghuradze will go for goal...
Tonga are right back in this contest, and Fetu'u Vainikolo even sniffs an instant second try down the left only to be pulled back for a forward pass. Big, big five minutes ahead at Kingsholm.
Game on? Fetu'u Vainikolo eventually crosses in the corner to become Tonga's leading try scorer and grab his team a lifeline.
Now, can Kurt Morath add the all-important extras from the angle? He certainly can!
It gets worse for Georgia, too, as full-back Merab Kvirikashvili is sent to the sin bin for offside. They will end this game with 14 men on the field.
Tackles do indeed win matches, and Georgia are having to make plenty of those at the moment. Tonga are back inside their 22, but the clock is ticking.
But another knock-on, just at the crucial moment, means Georgia have a scrum themselves, from which they win a penalty.
They have 12 minutes to hold on for what would undoubtedly be their finest Rugby World Cup victory.
The Pacific Islanders are throwing everything, plus the kitchen sink, at Georgia here, camped inside their 22, but unable to find a way over...
It turns out that Tonga centre Siale Piutau didn't have control of the ball as he slid over under pressure, but they were again playing with an advantage in their pocket, so we'll head back once more. To touch, we go...
Tonga may well have grabbed themselves a try, through Siale Piutau, but we're heading to the television match official to check the grounding...
Tonga are on the charge now, up to the five-metre line. Can they drive their way over? A wayward kick forward means they can't, for now - but referee Nigel Owens had already awarded them a penalty after Georgia were caught offside, so they head to touch once more.
Tonga really need a bit of magic now, and a high tackle hands them an opportunity to head to the corner. They must, must turn possession into points.
All the while, Georgia have brought on a new-look front row, including Sale Sharks hooker Shalva Mamukashvili.
Yes they can! Forward Giorgi Tkhilaishvili picks the ball up at the base of the ruck, brilliantly side-steps his way past the first tackler and then bursts over from close range.
Merab Kvirikashvili converts from a tight angle and Georgia's lead is 14. Could that advantage be a winning one?
Now, here come Georgia through Merab Kvirikashvili, who beats a couple of tackles to send his side forward. They've got numbers over on the left too, can they make this count?...
There's no doubting Tonga have had more of the ball in this match, but a combination of poor handling and fierce Georgian defence means they trail.
It drifts wide from the Georgia full-back though, and so Tonga are reprieved.
It's yet another almighty shove from Georgia's pack too, and they've won themselves a penalty to boot, which Merab Kvirikashvili will kick for goal...
This is becoming more and more frustrating for the Tongans, as prop Halani Aulika tries to make some metres inside his own half but promptly spills the ball. That's handling error number eight for the men in red.
You just can't keep Mamuka Gorgodze out of the game, as the Georgia skipper picks the ball up at the base of the scrum and makes a half-break to get his side moving forward.
Go, go 'Gorgodzilla'...
A long boot forward from Merab Kvirikashvili hands Tonga a line-out inside their own half, which Exeter Chiefs hooker Elvis Taione will deliver. But, although they secure the ball from the original jump, Georgia's pack once again turn the ball over in contact.
Right then, Georgia fly-half Lasha Malaghuradze boots the ball long and gets us moving again. Just 40 minutes separate them from only their third-ever Rugby World Cup win.
It's fair to say 'Gorgodzilla' has had a stormer in that first half. The Georgian captain has led from the front...
BBC Sport at Kingsholm
Half-time here at Kingsholm and it's Georgia who leave the field with a spring in their step. Poor execution is hampering Tonga at the vital moments, but they're still well in this game.
Shades of last night, with the television match official involved plenty again? Leicester Tigers fly-half Freddie Burns seems to think so...
And that will be that for the opening 40 minutes. It's been a scrappy old half, but Georgia grew in confidence as the game progressed and lead thanks to Mamuka Gorgodze's try.
Controversy at Kingsholm!
The set-piece is superbly worked at close range and Viliami Ma'afu races over, sparking wild Tonga celebrations.
But Nigel Owens spotted a hint of a forward pass in the middle of it all - and when I say hint, I mean hint - and the cheers are turned to boos.
The TMO doesn't sound totally satisfied all was fair over the microphone, but referee Nigel Owens loses patience after several looks at the monitor and decides we'll crack on with the scrum.
Now, Tonga have won a penalty, but instead of heading for the posts go to touch...
It's Tonga's turn to attack now though, with Gloucester flanker Sione Kalamafoni making some precious yards on his home ground. They're into the 22 - can they find a response to Mamuka Gorgodze's earlier score?
Not before a Georgian hand knocks on to bring it all to a halt. And we're heading back up to the television match official too, with some suspicion of foul play in the ruck...
England full-back Ben Foden, who missed the World Cup through injury...
The Georgians have their tails up, as their massive pack once more keep hold of the ball at the scrum, allowing 18-year-old scrum-half Vasil Lobzhanidze to send a box-kick forward.
What have Tonga got in response then? They've gathered the restart safely enough and look to break from their own half - but, once again, knock the ball on under no huge pressure. The handling errors continue to mount, that was their sixth inside the opening 32 minutes.