They're Coming

They're Coming is an screamer GIF that pretends to be an image. This "image" originated somewhere on 4chan, likely on /v/, in 2013. The screamer is a comic with a sim waking up with a call asking the sim to not open the house's doors. The caller abruptly hangs up. The rest of the comic shows the sim scared until the last panel where a figure with a knife is shown.

After 5 seconds of viewing the comic, a flashing picture of Jeff the Killer pops up.

Link
NOTE : The following GIF contains a screamer!
 * i.4pcdn.org/x/1520618009362.gif