When I was in college I had a roommate who would take great joy in frightening the crap out of me. He would hide somewhere in our apartment then jump out screaming which would make me almost wet myself. The worst part was he wouldn’t just do this as soon as I got home from class, he would wait for me to find him. Sometimes he would be in my closet for a half hour before I opened the door and found him. Needless to say I spent a large chunk of my time in college petrified that someone was watching me.