Another one I thought of this morning: my mom's Chatty Cathy doll.
When I was a very small child, Mom brought out her childhood doll, excited to introduce me to Chatty Cathy. Unfortunately for Cathy, she'd been thrown across the room when my mom was a kid, and so when I pulled the cord to make her talk, all that came out was this demonic-sounding gobbledygook. I started screaming and crying. After that, my mom kept her hidden in her closet. I'm now over that fear. We laugh about it, and agree that my mom probably should have thought about the noises Cathy made before bringing her out
