All 3 of ours are afraid of the vacuum.

Chloe and Samson are afraid of the squirt bottle.

Saphirah is afraid of the vet.

Samson is afraid of anyone who comes into our house that is not my husband or me. (We wonder if some people think we are pulling their leg when we say we have 3 cats. The girl who is going to check in on them while we are gone for Christmas came to get instructions yesterday. I finally had to pull out the photo album and show her a picture of Samson. He crawled into our box spring and would NOT come out. --What's really bad is that she has been in our house several times before.)