by Jake Farrell
Rip or tear a piece of paper shaped like a diamond. Make one half of the diamond shape stick on the wall and the other half hang over like it is torn. To get this just right, cut a large diamond shape, fold it double (without leaving a crease / pressed folded line) and then tear the edges roughly so that both sides of the shape are rough but identical. Tell an adult that somebody has ripped the wallpaper.(Works well on expensive wallpaper)
Note: When sticking it to the wallpaper use something like sticky putty that won't damage the original wallpaper.