All except Flowerbelle retreat to the top of one of the many cat trees. Flowerbelle is deaf and missing an eye, so she doesn't usually even see them fleeing - but when she notices, she clearly wonders what the fuss is about!
martini stands about a foot away from the vacuum cleaner with her back arched. she follows me around like that the entire time i vacuum. then when i turn it off, she attacks it. i've actually seen her trying to bite it.
I caught Oliver stalking, pouncing on, and swatting the vacuum cleaner once.
Mia isn't usually around to begin with when I vacuum so I couldn't tell you, but Marble on the other hand is always around bc she's so darn nosy! She'll sit there and watch it go back and forth, if it comes at her, she'll move back a little and watch it go. She's not really afraid of anything.