What is the worst thing a sibling has done to you?

When I was in the first grade my older brother made me terrified of aliens and UFOs. He started by showing me a book from the town library with picures of UFOs. Next he showed me videos. After that movies. Eventually he started coming into my room around 1:00 am wearing and alien mask and making odd noises as an attempt to scare the living shit out of me. I couldn't sleep for months. Eventually I started hiding under the blankets in bed and pulled the shades down. I left the light on every night also. It took me until I was a fith grader to get over this. Thanks for scaring me Alex.