It seems to me that my first opinion of mild collective hysteria is the correct one.
Kevin dropped his head into his arms and giggled with mild hysteria.
Children are very psychologically suggestible, and I think they've gotten themselves into what you might call a state of, well, very mild hysteria.
There was a certain mild hysteria in his voice, and Brant could hardly blame him.
She was finally able to reduce her blind panic to mild hysteria by demanding that she go up and check on Laura.
Perhaps the creaking of that swing last night had simply put me on edge, and given me a temporary attack of mild hysteria.
They were, instead, in collective giggles fast approaching mild hysteria.
If it hadn't been for Daniel's easy jokes and constant banter, the celebrational part of the flight might have dissolved into mild hysteria.
He added, however, that after 20 minutes of any rehearsal mild hysteria usually sets in among the cast.