It's a lousy week to be an American and this is the cherry on top of the icing on top of the glaze on top of the really really ugly cake.
The American leader, who has been condemned throughout his presidency for failing to tackle climate change, ended a private meeting with the words:
"Goodbye from the world's biggest polluter."
He then punched the air while grinning widely, as the rest of those present including Gordon Brown and Nicolas Sarkozy looked on in shock.
My sympathies America.