Edinburgh produced a sensational second-half fightback to beat Stade Francais 28-23 in the European Challenge Cup despite Phil Burleigh's red card, while Pool 4 leaders Cardiff Blues eased past Bath in Pool 4.
Pro12 club Edinburgh looked set to lose their 100 per cent Pool 5 record when they trailed 20-3 at half-time, with Waisea Vuidarvuwalu and Sekou Macalou scoring the Stade tries at Murrayfield on Saturday.
The Top 14 outfit's lead was reduced to 20-15 after Damien Hoyland and Ben Toolis dotted down, but they had a numerical advantage for more than half of the second period after Burleigh saw red following an incident which resulted in Pascal Pape dropping to the turf.
Morne Steyn slotted over a penalty to increase his points tally for the night to 13, but Edinburgh were rewarded for their character when Sam Hidalgo-Clyne nipped in to score.
And they were not finished yet, sealing a famous win courtesy of two penalties from Duncan Weir - who scored 13 points in total - on a day to remember for Scottish rugby, which also saw Glasgow Warriors win at Racing 92 in the Challenge Cup.
Edinburgh are two points clear of second-placed Harlequins, who hammered Timisoara Saracens 42-3, and Stade are down in third with work to do after three games.
Cardiff Blues moved five points clear at the top of Pool 4 after a resounding 28-3 victory over second-placed Bath.
Three Steven Shingler penalties to one from Tom Homer put the Pro12 outfit 9-3 up at half-time, then tries from Matthew Morgan, Alex Cuthbert and Scott Andrews put Danny Wilson's men out of sight.
Gaetan Germain scored 21 points to ensure Brive are the new leaders of Pool 3 following an 43-8 rout of Enisei-STM, while Worcester Warriors beat Newport Gwent Dragons 33-20 to move up to third.