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A: Cheerful greeting brimming with barely-constrained excitement and enthusiasm!
B: …cautious return greeting, full of suspicion and vague dread.
A: Announcement of upcoming event that sounds ridiculous, impossible, and extremely dangerous.
B: Immediate attempt to explain that the vent appears ridiculous, impossible, and extremely dangerous.
A: Blithe dismissal of warning, followed up with partial explanation that suggests something is terribly wrong.
B: Question intended to highlight the absurdity of the explanation.
A: Second partial explanation that, when placed in context with the first, indicates an over-literal interpretation of langauge.
B: Attempt top lace comment in the abstract context in which it was obviously intended.
A: Silent contemplation.
B: Silent, hopeful waiting.
A: Enthusiastic declaration making it apparent the explanation has had no effect whatsoever!
B: General statement of self-loathing.