Paddy and Mick were working on a building site, Paddy says to Mick, "I'm going to pretend I'm stressed and the foreman will send me home."
As the foreman was doing his rounds Paddy jumped up to the rafters and started shouting, "I'm a light, I'm a light." The foreman told Paddy to get down and said, "Paddy, you are stressed, go home and relax, come back in a couple of days when you feel better."
Paddy packs his things and heads home, then Mick started packing his tools, the foreman said, "Mick, what are you doing?" Mick replied, "Well I can't work in the dark."