This one alba?
Man walks into a bar with biscuit tin and a duck.
"Landlord", he says, "this here is a dancing duck - it will drag folk in for miles around and will make you a fortune."
With that, he places the tin on the bar, and the duck on the tin.
"Put on some music", so the landlord puts a few coins in the jukebox.
The duck starts to hop from one leg to the other, pretty much in time with the songs.
"That is fantastic", says the landlord, "How much for the dancing duck???"
After much haggling, they settle on £500. The man leaves a card with his mobile number, and the landlord puts a big sign up outside the pub, advertising his new attraction.
The pub steadily fills, loads of beer is sold, everyone is enthralled by the dancing duck, hopping away to the sounds from the jukebox.
The landlord rings 'Time' and all drift off home.
All that is left is a quiet, empty pub but the duck is still dancing.
The landlord has a pint, thinks about it,but doesn't know what to do. The duck is STILL dancing, so he rings the man on the mobile number he has left.
"Hi," he says,"Its me, at the pub; all the punters have gone home, the jukebox is off but the duck wont stop dancing," he says.
"What should I do???" he asks....
"No Problem," says the man, "Just lift the biscuit tin lid and blow out the candle."