By far and away the best one I've read on here. Brilliant that....in fact, it deserves a gif....
Doesn't do it for me, I'm afraid. I prefer the duck one:
A duck walks into a bike shop and asks the owner "Have you got any beer?"
"Sorry," says the owner, "it's a bike shop, we've only sell bicycles"
"OK," says the duck and leaves.
Five minutes later the duck walks back in and asks the owner "Have you got any beer?"
"Er..., no" says the owner, "as I said, it's a bike shop and we only sell bicycles"
"Right-o" says the duck and leaves.
After another five minutes the duck walks back in and asks the owner "Have you got any beer?"
"Look" snarls the owner, "This is a bike shop. We only sell bicycles. Ask one more time and I'll nail your fucking beak to the counter!"
"I was only asking" says the duck and leaves.
Another five minutes pass and the duck walks back in and asks the owner "Have you got any nails?"
"No," replies the owner.
"Right then, have you got any beer?"