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You made it even better, and I love that.
Adding to it a bit, I feel like Halt would be the type of person who - unless he is woken in the field under threat - doesn't quite understand what anyone is saying when he first wakes up. You know that feeling where someone is telling you something, but it doesn't make any sense because your brain isn't fully loading yet? Yeah, that.
HOWEVER, Halt doesn't like looking stupid, so he'd just reply to whatever his brain is telling him the other person said - hence the random things being said. This leaves the other person bewildered, amused, and - in Crowley's case - completely ecstatic.
Tired and sleepy Halt saying random things because his brain isn't functioning properly.