Agor.io

Agor.io was a screamer webpage that supposed to trick people who mistyped the domain Agar.io.

When the site opened, an image of Jeff The Killer appeared which quickly exchanged between negative and normal colors at a ratio that could cause seizures along with a loud, almost metallic sound, the same .swf animation of Anne.jpg and Gifura, next to a text that said "L3mm1ng Braz1I App3r Yazir Alyx WanR00t H0rs3 D0nny". When the user tried to close the page, a window appeared with the text "U SCARED BRO LOL" forcing the user to close the browser completely (although some browsers would not close forcing to kill the process with Task Manager or do Ctrl+Alt+Delete/Del). Since August 2015, the site was decommissioned.

The creator of the Agor.io website was found to be Preston Kellenberger, living in Sardinia, Ohio.

Media
There were multiple social media posts about the site, the majority of them coming from Reddit. Many of the posts are simply to warn people about the screamer, but this one in particular was supposedly written by a parent whose nine-year-old son had an Epileptic seizure when trying to play Agar.io because they misspelled it as ''Agor.io. ''The mother states she is talking to a lawyer and is attempting to track down and prosecute the creator of the Agor.io website.

Links
 NOTE : The following websites contain screamers with flashing lights.
 * web.archive.org/web/20150721015933/agor.io
 * keylog.me
 * img.4plebs.org/boards/f/image/1431/90/1431902577023.swf (No message box when closed)
 * vladimir.bagaev.igs-stade.net/agor.io