A wonderful thing happened at a screening of Dead Poets Society last night in Merrion Square.

During the climatic "O Captain, My Captain" scene - where Robin Williams' character leaves the classroom and all the boys stand on their desks - the entire audience spontaneously got to their feet with many shouting the iconic line.

And according to those that were there, it was a very special moment indeed.

There was a screening of Dead Poets Society in Dublin tonight & at the end the crowd stood up and shouted Captain my Captain! #Happenings — Deirdre O'Kane (@DeirdreOKane1) August 15, 2014

Standing ovation for Robin Williams to finish the night off...a magical night. proud to be part of it. @Happenings1 pic.twitter.com/qMftORAVBh — JigsawYMH (@JigsawYMH) August 14, 2014

The screening was organised by Happenings Dublin, with proceeds from the night going towards Pieta House.

Just... Wow.