When I was little, I was at home with my big sister and her friend in her room. They told me to stop annoying them, so I said "make me!". They picked me up and shut me in the closet. My mum called everyone to dinner and my sister told me to let myself out.. but she forgot it doesn't open from the inside. I was trapped in there for hours, before someone noticed I was missing! I am still Scared of that closet.
At my house we always have the shower curtain closed in the bathroom. My little cousin (4 yrs old) was over and I told him there was a monster hiding behind it and it would eat him...later he was too Scared to even go in there with his mom so he crapped in his pants...no regrets...
When I was little, me and my cousin were fighting, and i smashed his head into his moms car window by accident. I was so Scared I ran and told her first, I said he banged his head to scare me. And he got in trouble.