When someone opens a door something scary will fall on them.
Step 1: One
first take a piece of string,a box or bucket,some tape or prestick and of corce some thing scary or water.
Step 2: Two
stick one end of the string in the midle of the bucket/box.
Step 3: Three
stick the other end of the string on the wall above the door, make sure the bucket is just below the door.
Step 4: Five
put the bucket ontop of the doo while it is almost closed,
and dont forget to put something scary or water in the box/bucket.