Wow. I need a lie down after all that today. That was an incredible match and you can read all about in Michael Morrow's report here.
Video reaction is already up on our website and there is more to follow so why don't you head in that direction now.
In the meantime, thanks for your company once again. Congratulations to Armagh and we'll forward to next weekend's two remaining quarter-finals as Antrim face Tyrone in Armagh on Saturday evening with Fermanagh taking on defending provincial champions Donegal on Sunday.
Both those games are live on BBC Two Northern Ireland next weekend.
Tally 'bitterly disappointed' by Down defeat
Down 3-13 Armagh 2-17
Down manager Paddy Tally is left "bitterly disappointed" by his side's defeat and suggests that a lot of similar tackles to the one which led to Caolan Mooney's sending off were not punished to the same extent by referee Anthony Nolan.
"Our lads are hurting in there. They gave everything in a very challenging game. They had to take a few setbacks there and still kept going to the very end. You can't ask for much more.
"Small things went against us. We made poor decisions at times. I never doubted the effort and commitment of these lads and today they proved it again.
"I don't know [about the Caolan Mooney sending off incident]. It happened very, very quickly. It looked like a bad tackle but there seemed to be a lot of very similar tackles throughout the game and there was only yellow cards given.
"I'll have to review it again but I thought it had a massive bearing on the game. To lose a player like Caolan was tough but the boys overcame that.
"It came down to that goal at the end where the ball was flicked in [by Andrew Murnin] and the goalkeeper couldn't get to it.
"That gave Armagh that wee platform with them going four ahead even though we got that goal right at the end. We needed the last kickout and we couldn't get it."
'I don't know where to start' - Armagh skipper Grugan
Down 3-13 Armagh 2-17
Armagh skipper Rory Grugan struggles to sum up his emotions after this most incredible of contests.
"I don't know where to start. We showed great character. We let them back into the game in normal time and then we had to do the same thing in extra-time.
"It's new territory for us now having won an Ulster Championship game and it will be a tough match for us against a team that played in Division One this year."
Down missed a trick
Down 3-13 Armagh 2-17
Brendan Devenney
Former Donegal forward on Radio Ulster
Quote Message: It was a massive occasion. Armagh just about got over the line, but fair play to Down who gave it their all. But in that first period of extra time they invited Armagh on to them, when they should have pushed on.
It was a massive occasion. Armagh just about got over the line, but fair play to Down who gave it their all. But in that first period of extra time they invited Armagh on to them, when they should have pushed on.
Armagh win by one point
Full-time: Down 3-13 Armagh 2-17
Armagh hold on to take a one-point victory in this most dramatic of contests. They will face Cavan in the Ulster semi-finals.
Down net again to cut margin to one
Down 3-13 Armagh 2-17
Incredibly, there is there minimum between the sides again as Jarlath Og Burns, who has been outstanding for Armagh, diverts a long ball into his own net. Two minutes of added time in extra-time left, we're hearing.
O'Neill surely delivers the insurance point
Down 2-13 Armagh 2-17
Armagh surely have it now as Rian O'Neill's eighth point of the game puts them four up. One minute of extra-time left.
Two minutes left in extra-time
Down 2-13 Armagh 2-16
Armagh remain three ahead with two minutes of extra-time left. I've said this before today but it's looking good for the Orchard men.
Murnin goal puts Armagh three ahead
Down 2-13 Armagh 2-16
This incredible game has yet another turn as Murnin soars to flick a Rian O'Neill high ball to the net, with the help of a post. Astonishing stuff.
Murnin levels for Armagh
Down 2-13 Armagh 1-16
But Armagh do level in the third minute of the second period of extra-time as substitute Andrew Murnin fires over a glorious point.
Clarke misses chance to level
Down 2-13 Armagh 1-15
Just as he did in second half injury-time, Jamie Clarke misses an Armagh chance.
Campbell reduces Down's lead to one
Down 2-13 Armagh 1-15
Armagh have made a purposeful start to the second period of extra-time as Stefan Campbell cuts inside from the right flank to fire over a fine point. Just one in it now.
First period of extra-time over
Down 2-13 Armagh 1-14
Paul Devlin has a difficult free from a tight angle on the right but he misses the chance as Anthony Nolan blow up for the end of the first period of extra-time. Down remain two ahead.
Kennedy replies for Armagh
Down 2-13 Armagh 1-14
Armagh work a goal chance but Ryan Kennedy, back on on the field, blazes his close-range chance over the crossbar. Two between the sides late in the first extra-time period.
Down move three ahead
Down 2-13 Armagh 1-13
Substitute Barry O'Hagan has increased Down's lead to three with a long-range point although there is a suggestion the ball may have gone wide. But Anthony Nolan counts it a point. Armagh now look in trouble.
Guinness is good for Down
Down 2-12 Armagh 1-13
James Guinness, whose point ensured extra-time, has fisted over another Down score.
Armagh injury
Down 2-11 Armagh 1-13
Armagh's Stephen Sheridan is forced off by injury as Ben Crealey comes on as his replacement. Seven minutes into the first period of extra-time and not much has happened.
Down's Harrison booked
Down 2-11 Armagh 1-13
Connaire Harrison is yellow carded for a high challenge on Rian O'Neill.
Down in front
Down 2-11 Armagh 1-13
Paul Devlin, who hit Down's crucial penultimate point in normal-time, strokes the Mourne County ahead with another free.
Extra-time starts
Down 2-10 Armagh 1-13
Anthony Nolan throws the ball in once more. Charlie Vernon is back on for Armagh. We're trying to work out who is bringing Down's complement back to the full 15.
Live Reporting
John Haughey
All times stated are UK
Latest PostThat's all folks
Down 3-13 Armagh 2-17
Wow. I need a lie down after all that today. That was an incredible match and you can read all about in Michael Morrow's report here.
Video reaction is already up on our website and there is more to follow so why don't you head in that direction now.
In the meantime, thanks for your company once again. Congratulations to Armagh and we'll forward to next weekend's two remaining quarter-finals as Antrim face Tyrone in Armagh on Saturday evening with Fermanagh taking on defending provincial champions Donegal on Sunday.
Both those games are live on BBC Two Northern Ireland next weekend.
Tally 'bitterly disappointed' by Down defeat
Down 3-13 Armagh 2-17
Down manager Paddy Tally is left "bitterly disappointed" by his side's defeat and suggests that a lot of similar tackles to the one which led to Caolan Mooney's sending off were not punished to the same extent by referee Anthony Nolan.
"Our lads are hurting in there. They gave everything in a very challenging game. They had to take a few setbacks there and still kept going to the very end. You can't ask for much more.
"Small things went against us. We made poor decisions at times. I never doubted the effort and commitment of these lads and today they proved it again.
"I don't know [about the Caolan Mooney sending off incident]. It happened very, very quickly. It looked like a bad tackle but there seemed to be a lot of very similar tackles throughout the game and there was only yellow cards given.
"I'll have to review it again but I thought it had a massive bearing on the game. To lose a player like Caolan was tough but the boys overcame that.
"It came down to that goal at the end where the ball was flicked in [by Andrew Murnin] and the goalkeeper couldn't get to it.
"That gave Armagh that wee platform with them going four ahead even though we got that goal right at the end. We needed the last kickout and we couldn't get it."
'I don't know where to start' - Armagh skipper Grugan
Down 3-13 Armagh 2-17
Armagh skipper Rory Grugan struggles to sum up his emotions after this most incredible of contests.
"I don't know where to start. We showed great character. We let them back into the game in normal time and then we had to do the same thing in extra-time.
"It's new territory for us now having won an Ulster Championship game and it will be a tough match for us against a team that played in Division One this year."
Down missed a trick
Down 3-13 Armagh 2-17
Brendan Devenney
Former Donegal forward on Radio Ulster
Armagh win by one point
Full-time: Down 3-13 Armagh 2-17
Armagh hold on to take a one-point victory in this most dramatic of contests. They will face Cavan in the Ulster semi-finals.
Down net again to cut margin to one
Down 3-13 Armagh 2-17
Incredibly, there is there minimum between the sides again as Jarlath Og Burns, who has been outstanding for Armagh, diverts a long ball into his own net. Two minutes of added time in extra-time left, we're hearing.
O'Neill surely delivers the insurance point
Down 2-13 Armagh 2-17
Armagh surely have it now as Rian O'Neill's eighth point of the game puts them four up. One minute of extra-time left.
Two minutes left in extra-time
Down 2-13 Armagh 2-16
Armagh remain three ahead with two minutes of extra-time left. I've said this before today but it's looking good for the Orchard men.
Murnin goal puts Armagh three ahead
Down 2-13 Armagh 2-16
This incredible game has yet another turn as Murnin soars to flick a Rian O'Neill high ball to the net, with the help of a post. Astonishing stuff.
Murnin levels for Armagh
Down 2-13 Armagh 1-16
But Armagh do level in the third minute of the second period of extra-time as substitute Andrew Murnin fires over a glorious point.
Clarke misses chance to level
Down 2-13 Armagh 1-15
Just as he did in second half injury-time, Jamie Clarke misses an Armagh chance.
Campbell reduces Down's lead to one
Down 2-13 Armagh 1-15
Armagh have made a purposeful start to the second period of extra-time as Stefan Campbell cuts inside from the right flank to fire over a fine point. Just one in it now.
First period of extra-time over
Down 2-13 Armagh 1-14
Paul Devlin has a difficult free from a tight angle on the right but he misses the chance as Anthony Nolan blow up for the end of the first period of extra-time. Down remain two ahead.
Kennedy replies for Armagh
Down 2-13 Armagh 1-14
Armagh work a goal chance but Ryan Kennedy, back on on the field, blazes his close-range chance over the crossbar. Two between the sides late in the first extra-time period.
Down move three ahead
Down 2-13 Armagh 1-13
Substitute Barry O'Hagan has increased Down's lead to three with a long-range point although there is a suggestion the ball may have gone wide. But Anthony Nolan counts it a point. Armagh now look in trouble.
Guinness is good for Down
Down 2-12 Armagh 1-13
James Guinness, whose point ensured extra-time, has fisted over another Down score.
Armagh injury
Down 2-11 Armagh 1-13
Armagh's Stephen Sheridan is forced off by injury as Ben Crealey comes on as his replacement. Seven minutes into the first period of extra-time and not much has happened.
Down's Harrison booked
Down 2-11 Armagh 1-13
Connaire Harrison is yellow carded for a high challenge on Rian O'Neill.
Down in front
Down 2-11 Armagh 1-13
Paul Devlin, who hit Down's crucial penultimate point in normal-time, strokes the Mourne County ahead with another free.
Extra-time starts
Down 2-10 Armagh 1-13
Anthony Nolan throws the ball in once more. Charlie Vernon is back on for Armagh. We're trying to work out who is bringing Down's complement back to the full 15.