Cool/Incredible Lightning is a screamer video uploaded to eBaum's World in 2006.
It starts with the title, and some soothing music. What follows is some low-quality grayscale video footage of sheet lightning in the clouds. However, at 29 seconds, a white sculpture of a clown with monstrous, bloodied eyes and mouth flashes repeatedly on a grayscale picture of a bathroom, along with some loud and highly distorted electronic/guitar sounds. The video then ends, saying "Did I scare you? ;] -PJ" alongside the sounds of Big Ben chiming.
NOTE: The following video contains a screamer!