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The following FAQ entries may contain spoilers. Only the biggest ones (if any) will be covered with spoiler tags. Spoiler tags have been used sparingly in order to make the page more readable.
Harvey is based on a play written by American playwright and screenwriter Mary Coyle Chase [1907-1981]. It won the Pulitzer Prize for Drama in 1945.
It showed the audience at the very beginning of the movie that Elwood [James Stewart] was in a world of his own, away from troublesome "worldly" things. He lives only for his friends (real or imaginary) and his family.
A recipe for and egg and onion sandwich can be found here. It actually doesn't sound too bad.
The 2001 film Donnie Darko also features a giant rabbit that only the protagonist can see, but the director, Richard Kelly, claimed that he had never even seen Harvey.
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