So what exactly was Yaya's joke?

I genuinely don't know yet?
The BEST FORUM in all the land and all the world
http://www.mancityfans.net/mcfnet/
http://www.mancityfans.net/mcfnet/viewtopic.php?f=119&t=55522
nottsblue wrote:Knock knock
Whose there
Irish burglar