What irrational fear does your pet have?

I have 2 cats, 1 being a recently adopted black ball of Floof that is now 6 months old!

That specific she is scared of almost anything,
anything orange, white, or green that falls on the ground she immediately turns her head too, anything that moves on its own,

tries to beat up cats twice her size but is terrified when she sees a bug (I guess we have that in common.)

What is your pet scared of that they have no reason too?