Bloke goes into a pub with an octopus. Barman says
"You can't bring that in here mate."
"But this is no ordinary octopus," says the bloke. "it's a musical genius. It can play any instrument you can name." To prove it he puts the octopus on the piano stool and in seconds the whole pub is transfixed. Brahms to Chas'n'Dave singalongs, the octopus can do it all.
The customers rise to the challenge and nip home to fetch instruments, which to their amazement are all played brilliantly. Trombone, violin, glockenspiel, tuba, there seems no end to the octopus's talents. He's in the middle of an Acker Bilk medley when Jock appears with his bagpipes. The octopus drops the clarinet and rushes at the bagpipes, drags them onto the mat and starts wrestling with the tartan bag.
"Don't let me down now," says his owner, "get on and play something"
"Play something?" says the octopus "I'm trying to get her knickers off."