In role-playing games, metagaming is a term often used to describe players' use of assumed characteristics of the game.
Various factors can contribute to sleep terrors, such as: 1  Sleep deprivation and extreme tiredness. 2  Stress. 3  Fever (in children). 4  Sleeping in unfamiliar surroundings. 5  Lights or noise. 6  An overfull bladder.
Nightmares in adults are often spontaneous. But they can also be caused by a variety of factors and underlying disorders. Some people have nightmares after having a late-night snack, which can increase metabolism and signal the brain to be more active.f you've gone through a traumatic event, such as an attack or accident, you may have recurrent nightmares about your experience. Although nightmares and night terrors both cause people to awake in great fear, they are different.