Arsenal moved five points clear at the top of the Premier League as Declan Rice left Luton heartbroken with a 97th-minute winner to earn the Gunners a thrilling 4-3 victory.
With Liverpool and Manchester City not in action until Wednesday, the opportunity was on offer for the Gunners to extend their advantage over their title rivals, and they did just that as Rice headed home with the final touch of the match.
Arsenal were sent on their way, with no sign of the drama to come, when Gabriel Martinelli put them in front after 20 minutes, sweeping an effort into the bottom corner after a quick throw-in from Gabriel Jesus had set Bukayo Saka away.
However, Luton were swiftly level and, unsurprisingly, it came from their first corner of the match. The ball was swung into the middle, and Gabriel Osho was allowed the room to power a header home.
The Gunners hit back just before the break though, ensuring they took a lead into the break. Ben White, back in the side in place of the injured Takehiro Tomiyasu, drove to the byline and stood up a brilliant ball to the back post, where Jesus had a simple task with his header.
Luton turned the match on its head early in the second-half, as David Raya had eight minutes to forget. The Arsenal goalkeeper was first not strong enough from a corner, as Elijah Adebayo got up above him and nodded the ball into an empty net, before Raya let Ross Barkley's strike squirm straight under him as Luton took a shock lead over the the Gunners.
That advantage lasted only three minutes, as Kai Havertz levelled a chaotic match on the hour mark. Jesus flicked the ball through for the German, who beat Thomas Kaminski to the ball and lifted the ball beyond the Luton goalkeeper.
It left the Gunners, or indeed Luton, with 30 minutes to find a winner. Luton dropped deeper and deeper as the minutes ticked on, Arsenal's pressure almost constant and Havertz and Leandro Trossard both close to snatching all three points.
With added-time ticking away, Arsenal's race looked to be run. But Odegaard clipped a ball into the middle, Rice flicked a header into the bottom corner, and bedlam was sparked in the away end.
