Scary Yahoo Prank
From Screamer Wiki
When the page is entered it looks like an old Yahoo! search. When you click the search button the page will show some search results. These will always be the same no matter what you type. All the results end in "You're going to die". After a little while the page will start shaking and a scary face will appear on the screen with a loud scream. After the scream is over, the site will restart.
Links
- scaryforkids.com/pics/Yahoo-Search.htm (this contains a screamer)