Believe me Arad when I say that the credibility of America as the leader of the free world does not rest on the public flubs of your president. Ye shall be judged by your actions - ie: with regards to creating a war in Iraq instead of pursuing Bin Laden, but allowing Korea and Iran to develop neuclear weapons, the criminal harassement of travellers to your country because they are HIV+, the criminal way "war criminals" have been treated in prisons in Iraq and on Cuban soil, the continuing denial of rights to gays in general (the gay mariage issue in particular), not to mention the accademy awards.
No, your country's reputation as the best in the world is not being tarnished by your president's flubs, like bumping his head on the ceiling of a helicopter - it's Amerca's continuing support of non-freedom policies that is making the world over develop it's views of America as the land that is not free (there's the joke! - I've been to the states once in the past 10 years [I live less than a 2 hour car ride away from the border] - & that was to get from the maritimes to southern Ontario).
Sorry for the rant - but it felt good.