For me it's roaches. My worst fear. Once I had a 3 day long battle with a roach (it was big and I was scared to go near it). On the 3rd day it forced me out of my own territory (it went in my bedroom and I was stuck in my living room because I was too scared). I ended up ordering 3 cans of bug spray and practically emptied half a bottle on it when I found the courage to get close.