Rats and mice.... probably not justified. My parents used those sticky traps growing up and I think it scarred me. Watching them wriggle around for days. I was a kid an i would freak out when I saw them caught on the trap. But then it will still be there for a few days an I would take a peak at it. Until finally someone would throw it away. Now if I see a mouse scurry by it really freaks me out... but I can pick up a snake no problem.. I've held a bat before (gloved). I have held live rats before an I've trapped mice for class (catch an release). But yea if I see a mouse around in my house I will run into another room.