(a rework of an old favourite, first overheard several EU reforms ago)
David Cameron is trying to renegotiate Britain's membership of the EU. François Hollande and Angela Merkel are getting increasingly infuriated with their British counterpart.
Suddenly, a genie appears and gives them one wish each.
Hollande, in frustration, says "block ze channel tunnel."
So sure enough, the genie blocks the channel tunnel.
Cameron, in defiance, says "build a wall around the UK."
So sure enough, the genie builds a wall around the UK.
Merkel says to the genie, "what's this wall like?"
The genie says, "it's about five meters high, five meters wide, and nothing can get through it."
"fill it with water."