Fourth Walls are the barriers that separate all Dimensions from one another, according to Chris. Its name derives from the trope "breaking the fourth wall", where fictional characters of a media get to "interact" with the audience.
According to Chris, only beings that are just as powerful as him are able to interact with the residents of dimensions outside our own (which he refers to as OCs). He has determined that the primary cause of this is from a mysterious force he refers to as the fourth wall. He describes it as being an impenetrable barrier that only OCs are able to pass through for a short period of time and directly communicate with the viewer. He believes that a few of these OCs are also watching everything that the people on the Earth dimension are doing, chronicling it, and even channeling them. In Chris' case, he believes that the OC CWC Psychlight, whom was meant to be a CPU Goddess representation of the CWCki (or the CWCipedia), is his meta-physical chronicler. Chris has also stated that ever since the Dimensional Merge, the people that have survived are returning the favor of being stalked by cartoon characters by becoming one with the cartoons themselves.