(Trying) to Startle People

I don't know why but I always feel like scaring people. I think it is because I find it amusing and fun. I tried to scare some people but sometimes my plan backfires. I usually fail but I keep playing around. One of the funniest scares I made was when it was after school and I was on the 1st floor. My sister and I were there when we heard someone coming down the stairs. I hid next to the light switches so that person couldn't see me. When he came out, I was about to say "ROAR" but I couldn't because that person was T. Bill. T. Bill didn't see me yet but he kept walking towards the elevator when he saw Selena. She told him that I was trying to startle him . He turned and saw me. He started to laugh because I failed. Ha ha very funny. I wonder what his reaction would be if I really scared him... (starts to laugh evilly)