2. Shoo, shoo, go away! Oh, sorry, not you...did you see that stinging insect come out of the bonnet Mrs. Drone left here? It nearly stung me! I didn't realize she was so stirred up about something. What did she have in her bonnet?
From Quiz Laundry Day
Answer:
Bee
Someone with "a bee in their bonnet" has taken an interest in or is concerned over a certain thing or idea, possibly to the point of obsession. A bee can also be planted in someone else's bonnet - in other words, you can get them concerned about whatever it is that's taken your fancy! Having a bee in your bonnet can also mean you are angry. The term is considered to have originated from a 1648 poem by Robert Herick, "Mad Maid's Song."
(I've since heard that Mr. Drone has finally finished painting the house - Mrs. Drone's been obsessed with it for ages, gotten angry, and finally got him interested as well! That must've been what the bee was about.)