How to Scare the Crap Out of Someone

How to Scare the Crap Out of Someone is a tutorial video with a screamer uploaded to YouTube on October 4, 2011 by Howcast.

Video
As the title states, the video shows a tutorial that explains how to scare somebody in five steps.

Steps
Step 1: "Place a fake critter in their bed"; a man sets up a fake spider at woman who sleeping in a bed. After a few seconds pass, the woman gets scared after seeing the fake spider. Step 2: "Appear in a bathroom mirror"; a masked man goes to bathroom to scare a woman. Step 3: "Imitate a confined space"; a man puts a cardboard box over the head of another man, who is sleeping on the sofa. Step 4:"Hide your hand." A man is setting up a prank by cutting a hole into a candy bag. After that, the girls appear and one of the girls, while the man is holding the bag, inserts her hand into the bag. Step 5, which contains a screamer: "Use the computer." A man watches K-fee commercials (which only shows the first few seconds) with a notebook; then, a zoomed-in picture of Regan MacNeil from The Exorcist appears with a short scream. Afterwards, the outro plays normally, but a few seconds has passed, the same screamer from the fifth step appears again, then the video ends.

Links
NOTE : The following video contains a screamer!
 * youtube.com/watch?v=WeY8nKjT67A