Video | Screamer
After grabbing the user's attention, the flash is abruptly interrupted by an unexpected image, usually accompanied by a burst of sound, such as a scream or roar. The picture can range from a crude cartoon to an explicitly gruesome image, in which case the shock comes partially from the content of the picture.
In most cases, the picture itself, upon further viewing, is not in actuality very scary. Therefore, in almost all of these animations, the shock comes primarily from the startling, unsettling scream, which transmit and magnify the scariness of the image and the shock itself in whole.