You'd be forgiven for believing that tonight was fight night such was the crowd volume.
But it was just a fan event put in place to promote the fight between Conor McGregor and Jose Aldo and it's safe to say that they came out in their droves.
Just take a listen to how loud the Dublin crowd responded when UFC president Dana White emerged from back stage with a resounding "Céad Mile Fáilte."
Goosebumps.
