What time does the library open?

"What time does the library open?" the
man on the phone asked. 

"Nine A.M." came the reply. "And what’s the idea of calling me at home in
the middle of the night to ask a question like that?"

"Not until nine A.M.?" the man asked in a disappointed voice.

"No, not till nine A.M.!" the librarian said. "Why do you want to get in
before nine A.M.?"

"Who said I wanted to get in?" the man sighed sadly. "I want to get out."