VIDEO: Watch RTÉ staff get pranked with a giant megaphone

You know the office prankster - that loveable scamp you want to kill, but at the same time, acknowledge he’s great craic?

Enter Carl Mullan, creeping up behind unsuspecting presenters and office staff to scare the living daylights out of them. Screams aplenty.

Except for Rick O'Shea. You do NOT mess with Rick O'Shea. He will kill you.