Over drinks, one psychiatrist asked the other, "What was your most difficult case?"
"Once I had a patient who lived in a complete fantasy world," the second replied.
"He actually believed he was Elvis's love child, and that he stood to inherit a fortune. For years he waited for a make-believe letter from a make-believe attorney. He never went out; just sat around and waited."
"What was the result of treatment?"
"It was an eight year struggle, but I finally cured him," the shrink said.
"...And then that stupid letter arrived."