Check out
this link with the "inside story" about the guy in the hotel scene (where Borat gets escorted out of the posh hotel). Unsure how true the story is, although I am sure it's fairly long.
The film
was funny but I don't think it was
as funny as the credit it's getting. I don't remember people even laughing that much in the cinema (but I am biased as I don't think it was that funny).