Expert: Juli D. - 9/23/2009

Question
Looking for a movie title that I believed was a Hitchcock, but I cannot identify it.

Keys: Unwitting person involved in spying, under hypnosis the sound of people laughing is really birds on Atlantic flyway, ending has air boats in the Everglades

Answer
Good Day!
       I apologise for the delay in answering!!!!
      I believe that the film you are thinking of is "North By Northwest", however part of your description sounds like "Spellbound". In NBNW, Carey Grant is mistaken for a spy and chased across the country (the most famous scene being, of course, Carey Grant running through a cornfield being chased by a crop-duster.) I think that this is most likely what ypu're looking for though it has been so long since I have seen it I can't remember the ending.
     "Spellbound" concerns a man that thinks he is a murderer but can't remember and he keeps having dreams about it. Ingrid Bergman plays a psychologist who is trying to help him. I think he may have been hypnotised in the course of that film, but again, it has been so long...

I did some research and these were the closest I could find to the description online as well. If neither of these films is what you're looking for, please let me know and I would be happy to do some more research!

I hope that this is helpful!

                          Cheers!
                                              ~J.