When younger, Tiger would ride on our shoulders when either of us was vacuuming. He was absolutely NOT AFRAID of the old one. Then we got the Dyson and he's not so fond of it, but still watches from a perch.
You would think Pippin would be terrified, but as the vacuum has never done anything bad to him, he just thinks its a lot of noise. Tiger taught him to just sit up on a couch until the activity is over.

The other 3 cat boys and Sam all prefer to be in another county during cleaning time!