This guy was staggering along the road, much the worse for the drink, throwing empty beer cans into the street and falling into peoples gardens. His singing gained the attention of a passing policeman who decided to question him.
"What do you think you're doing there?" the policeman asked.
"I'm on my works outing" came the slurred reply.
"Then" the policeman queried, "where are all the others?"
"Ah" the man grinned, "You see officer, I'm self employed!"