I don't mean to like your terror, but I have empathy with your story. I had a brother who would take days planning new ways to make my life a terror filled adventure. I gave as good as I got though, I dare say.
To this day he cannot eat mayo... tee hee hee.
My brother scared me so meanly and so often, I started carrying steak knives and as I approached a hallway intersection, I would jab the steak knives around each corner in opposite directions so if he jumped out at me, he'd get a steak knife in the gut. lol! Now, I look at that now and realize OH MY GOD, I could have stabbed my brother! But at the time, I was so terrified, I didn't think how terribly hurt he could get. Didn't even enter my mind. hahaha! Thank God he never jumped into my steak knives of death!