Since I was really scared by all those creepy gnomes and astronauts in Puzzle Agent, maybe I could put a giant picture of a gnome infront of my sister's bed, and when she wakes up and sees it, I can throw it at her and make her really scared. Oh, and I could also wear an astronaut suit, and slowly open my visor...... But then again, my sister never played Puzzle Agent, so she wouldn't really get it. Agh, never mind, thats a bad April Fool's joke. Hopefully you can think of better ones.