Hogan must get a U.S. general out of camp, Klink's plans to move the fence line, and Gertrude's arrival with her fiancé (that she would make Stalag 13's adjutant.)''
Klink: Don't come to attention; I'm just passing through.
Newkirk: Wasn't even considering it.
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Gertrude: Moving the guard towers is not necessary?
Hogan: Oh, there's never been a successful escape from Stalag 13.
Gertrude: Ja, so Klink has told me. And told me. And told me.
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Klink: Oh, excuse me. Schultz is drowing in the punch bowl again.
Fraulein Richter: Is there, uh, a chance that he might, uh, play the violin?
Hogan: When you joined the Underground, you knew you were risking torture.
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Hogan compares Klink's violin solo to Chinese water torture. This alludes to a slow, methodical process in which water is dripped onto an enemy's head with the intent of eventually rendering him insane. This method has never been directly attributed to Chinese usage; indeed it was first used in 16th Century Italy.
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