This is Really Scary

Video
This Is Really Scary! is a screamer video uploaded on YouTube by the user VenerableDread.

It begins warning the viewer that the video is not suitable for the faint-hearted, then, a picture of a bedroom appears. A poorly drawn monster will pop up three times along with a male voice saying "boo" repeatedly. After 23 seconds, a picture of a kid from the short film Rubber Johnny pops up along with a loud scream same as the one from Jingle Bells Reversed, and when the scream ends, a text saying "Scared you that time, eh? Pranked by VenerableDread once again!" appears.

Link
NOTE : The following video contains a screamer!
 * youtube.com/watch?v=y5mE_0NARaU