I was 14 or so years old, my mom was grocery shopping and my brother was at his friends house. I was all by myself at home. The phone rang and it was my grandma screaming frantically at me. She eventually calmed down enough to say she got a call from my mom saying "Help, the kids!" over and over again. She said it was our number on the caller ID. I told her this was impossible, my mom was out shopping. She was adamant. My mom walked in while my grandma was still on the phone and my mom calmed her down and assured her we didn't call her.
She was still freaked out so we went over to her house. She showed us our number on the caller ID at a time when nobody should have called. It was very creepy.