From "The First Invader."
By Paul Dallas
"Watching this tense scene from the doorway of his craft, the visitor gradually relaxed, and suddenly threw back his head and roared with laughter. For a full minute he stood there, head thrown back, peals of uncrontrollable laughter ringing out over the crowd. When his guffaws subsided enough to allow him to talk, he said: 'Why, bless me, I believe you're serious.' 'You're darn tootin' I'm serious', answered the non-loussed sergeant, taking a step forward, his gun trained on the stranger. 'Now just step down out of there'.
1958.