midnight crazies
Wild behavior common with cats late at night who will run from room to room and jump on furniture, often yowling, for no explicable reason.
Angela: What's wrong with Mr. Mittens? Last night he spent an hour racing through my apartment meowing like a banshee.
William: I wouldn't worry, it's probably just the midnight crazies: typical weird feline behavior.
William: I wouldn't worry, it's probably just the midnight crazies: typical weird feline behavior.