Olivier Sarramea came off the bench to score the last try, but a crucial one, for Stade Francais against Cardiff.
It earned them the bonus point that could be so critical for their chances in the Cup.
It was one of the best back moves of the Heineken Cup this season. And the way they took it, from deep inside their own half, cutting through the Blues' defence, and finding Sarramea to go over was breathtaking.
It secured Fabien Galthié's side a bonus point and really puts the pressure on Gloucester to deliver this weekend at Kingsholm.
TEAM OF THE WEEK - Biarritz
That was a phenomenal first half from Biarritz to silence the Welford Road crowd.
And the booing at the end of the match was amazing, although I'm not sure if they were booing Biarritz or their own side.
Biarritz deserved their win. Dmitri Yachvili controlled the game well from behind the pack. Leicester, as expected, came back, but they'd had such a good start that they held on to win.
The composure, power and technical brilliance of the pack, with the strength of the back row, was a joy to behold.
Judging them on this performance, it will be very difficult for Wasps to win in Biarritz. They were a disgrace at Wasps earlier in the tournament, but on Sunday the real Biarritz team turned up and were phenomenal.
I have never 'heard' Welford Road so quiet, and to do that speaks volumes.
I'd also like to give an honourable mention to Ulster.
They had a slender chance of qualification, but were really playing for pride.
They played fantastically well against Gloucester, with their forwards under strength but stuck to their task. They put Roy Maybank's poor decision to disallow a try behind them, scored another good try from Bryn Cunningham and when their talisman, Andy Ward, came off the bench when Gloucester were fighting back, they showed the spirit to hold on.
It was a game that Gloucester should have won. But in atrocious conditions, Ulster showed great team spirit and once again demonstrated that Ravenhill is a very difficult place to visit.
PLAYER OF THE WEEK - Harinordoquy
It is the first time I've seen Imanol Harinordoquy play to his potential in the Heineken Cup this year, stealing ball and tackling all over the park. He showed himself to be the class performer we know he is and he shaded his excellent compatriots alongside him in the back row, Thomas Lievremont and Serge Betsen, who would also have been worthy winners this week.
VILLAIN OF THE WEEK- Ellis
It is an obvious one, but my player of the week last time around, Harry Ellis, is my villain of the week and he has got to sort himself out.
I'm sure Andy Robinson will be saying the same thing. He should have been sent off for a previous incident moments earlier, and he should have been given a red card rather than the yellow he received.
It was inexcusable and there is no place for it in rugby. It was sheer stupidity, as he put his side down to 14 men, and this game is hard enough.
If he continues with this petulance, he will find out that there will always be someone bigger and harder that will have a go back at him.
It has called his England credentials into question. If he doesn't curb it, he will have no future for England, and maybe not at Leicester either.
Had Yachvili done the same thing in front of the Welford Road crowd, there could have been a crowd invasion.
MOMENT OF THE WEEK - Thompson
Steve Thompson popped up on the wing, where he has been for a year-and-a-half doing nothing, and scores a match-winning try for Northampton.
And he did very well, showing the great skill that we know he has, to come inside the fullback and go under the posts.
The score gives Saints a great chance of going through, and there may not be many English sides in the quarter finals.
And as good as it was for Saints, it will give Thompson a boost too, as his throwing at the lineout was shaky again.