Celtic attacking midfielder Tom Rogic has described what an "amazing" moment it was to score the late Scottish Cup victor against Aberdeen on Saturday.
Aberdeen's lead lasted just two minutes as Armstrong hauled Celtic level.
Football supporters have been told that neither Aberdeen nor Celtic will hold Scottish Cup final trophy events following the Manchester bombing.
"We are elated. It was a very tough game and to win it the way we did was special. The cup final, there's a lot of nerves in it".
But the 50-year-old, who netted 28 goals in 92 appearances for Aberdeen in the early 1990s, has seen reason to hope for the Dons, ironically in their 3-1 defeat to Celtic a fortnight ago. "But in the second half we showed our quality and had a number of chances to put it to bed".
"We had to ride a wave of attacks and if the game had gone to extra time we would have been looking to kick on again". It has given me so many good experiences and I still think there is more to come from us. "It's something that we will look back on forever".
"We have tried to match the best but we have fallen a bit short this year".
And despite their dominance this term, Brown admitted the sense of occasion may have played on the minds of the Celtic players in the first half at Hampden.
"Not many players feel like this in their career - the invincibles last week and to win the treble this week is some feat". Once we got in front, against a team which had beaten us five times this season and bounced into Hampden with no doubt, we planted that seed and made them fear losing.
"We set a standard right back at the beginning which has only fallen short in one training session and that was on Thursday".
Tierney believed that he was deliberately struck by Aberdeen striker Jayden Stockley. And the players have dealt brilliantly with pressure.
"Thankfully I took over a group of players who were very keen, hungry, coachable and willing to learn".