VIDEO: Scariest Internet Prank of All-Time? Posted 2:08 PM, May 15, 2014, by PHL17, Updated at 02:49pm, May 15, 2014 Share this:FacebookTwitterGooglePinterestLinkedInEmail This creepy clown pretends to kill in dramatic fashion as strangers walk by. Some call it the scariest web prank of all time. (GRAPHIC WARNING!) VIDEO: Scariest Internet Prank of All-Time?