These roaming scenescapes can be discovered in any part of the Umbra and overtake a traveller's senses to display some event of titanic proportions repeatedly until the Vista moves on. Events might include the Big Bang, Armageddon, or some other moment of catastrophic creation of cataclysm. The trapped viewer is safe from the effects of the Vista, and cannot affect them. Were it not for the disappearance of those individuals trapped within, they would seem nothing more than a roving holistic hallucination.