The Truman Show
Truman's (Jim Carrey's) suspicions become so overwhelming that he overcomes his fear of the sea. He reaches the border of his staged world via a boat and exits through a door in the wall.
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Read more about this film at The Internet Movie Database.
Read the script on-line
Buy it on VHS, widescreen VHS, VHS dubbed into French, VHS with Spanish subtitles or DVD at Amazon.com.