Shock.swf

Shock.swf was a screamer animation created in around-2008, the creator was unknown, but the domain is still active to this day.

The site will automatically download a flash animation to your computer, when you open it, it begins with a text stating "Wait for it...", after a few more seconds, will display a flurry of screamer pictures including Regan MacNeil from the, but also involved non-scary ones. in a few more seconds right after the screamer ends, the user will get a message saying "Boo! Did I Scary you"

Link
NOTE : the following shock site contain graphic content!
 * mit.edu/activities/puzzle/2010/puzzles/2009/the_zyzzlvarian_holovid_institute/shock.swf