I have no mouth but I must scream

Some years ago I was having insomnia and I decided to surf the Internet. I don't know whether I was looking for some Matrix/Level 13-related topic, or some weird science fiction. But I came across a nice short tale, called "I have no mouth but I must scream", which kept me amazed through the night. I remember that I looked for information about it since it left me chilled.

I post here a couple of nice videos that popped up in a later search in autumn.